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Triptych Framing 
GIMP

 

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Triptych Picture Framing
GIMP (GNU) -
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Triptych Framing GIMP (GNU)

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This GIMP (GNU) tutorial demonstrates how to create a Three-panelled Triptych Picture Frame from scratch. To work along, you are welcome to download the Start Image I am working with HereUnzip the file and open the image onto GIMP’s workspace.

Triptych - Pronounced Trip-tick
The word Triptych originates from the Greek language - Tri meaning three. It refers to three-panelled artistic productions that were popular during the middle ages. During this era, Christian Art was popular, and many churches today, display relics demonstrating triptych panelling in the form of wood carvings, paintings and stained glass windows. 

Note
If you are printing your work, choose a photograph with a
High Resolution (size).

Notes
You can quickly Undo a step at any time by pressing Ctrl then Z. Alternatively, click a previous Undo History snapshot - Windows then Dockable Dialogues then click Undo History. In addition, to Zoom in (or Zoom out) of your image; from the top menu, choose View then select a Zoom Tool from the subsequent drop-down list.

Understand Layers
Launch GIMP & Organise Its Workspace & Palettes

Printing Note
You will find it helpful to print this 31 Chapter tutorial, please read my
Printing Tips Here

1/
Open your choice of Start Image onto GIMP’s workspace - File then Open - Ctrl then O.

Note
Ensure the Layers and the Undo History Palettes are visible, and then drag them into position over your workspace - (Windows then Dockable Dialogues - then click Layers and Undo History).



2/ Add An Alpha Channel
Now, right-click over the Background Layer, and from the subsequent drop-down list, click Add Alpha Channel.

                         

3/ Duplicate The Background Layer
Duplicate the Background Layer by right-clicking over it and selecting Duplicate Layer from the subsequent drop-down list.



4/
Then from the left-side Toolbox, activate the Rectangle Select Tool.



And enter the following Replace the current selection settings into the Options Box.

                         

Now, still working on the Background
Copy Layer: drag out a vertical Rectangular Shaped Selection Marquee over the image’s left-hand side - as illustrated below.



Notes
If you are creating a three panelled (vertical) triptych frame, as demonstrated in this tutorial, you will be utilising the same-sized Rectangular Selection Marquee for all three panels. Therefore, ensure it is the correct size for your needs before commencing. To Resize the Rectangular Selection Marquee after its application: - left-click inside the Rectangular Shaped Marquee. Then resize the Selection Marquee by dragging one of the following Repositioning Handles. 

            

After you have applied the first Rectangular Selection Marquee (Triptych Panel): you are ready for the next step.



Size Note Important
After you have applied your first Rectangle Marquee, write down the Marquee’s Size, as illustrated below. In my instance the Size is 250 X 534 Pixels



5/ Invert The Selection Marquee
From the top menu, choose Select and then choose Invert - Ctrl then I. Your image and Layers Palette won’t change their appearance, however, the Undo Palette will display the Invert Selection step - as illustrated below.



6/
Now, still working the the Background
Copy Layer: from the top menu, choose Edit and then choose Clear. Alternatively, tap your Keyboard’s Delete Key

Because the Marquee was Inverted earlier; the area outside the single selected panel will be deleted, as illustrated by the Layers Palette below-right. (Your image won’t change its appearance).

                          

Congratulations, you have created your first panel, and you are ready for the next step.

Tip
Now is a good time to save your Layered Image as a
GIMP XCF File.

7/ Remove The Selection Marquee
From the top menu, choose Select and then choose Select None.

remobe marw whele round


8/ Duplicate The Background Layer
Now, (again) Duplicate the Background Layer by right-clicking over it and selecting Duplicate Layer from the drop-down list.



9/
Then from the Toolbox, ensure the Rectangle Select Tool is active .

Now, still working on the Background
Copy #1 Layer.
 

Drag out your second panel - as illustrated below.



Important: Resize The Rectangular Marquee
After you have dragged out your second Rectangular Shaped Marquee, refer to the Size
you wrote down earlier. Then (from the Rectangle Select Tool’s Options Box), clear the Size values already there, and type in the same values as the first panel, in my case this is 250 X 534. Your second Rectangular Marquee will automatically resize itself to match your new (Size) values.
 


10/ Invert The Selection Marquee
Then from the top menu, choose Select and then choose Invert - Ctrl then I.
 


11/
Now, still working the the Background
Copy #1 Layer: from the top menu, choose Edit and then choose Clear. Alternatively, tap your Keyboard’s Delete Key

Congratulations, you have now created your second panel and you are ready for the next step.

                          

Tip
Now is a good time to save your Layered Image as a
GIMP XCF File.

12/
Remove The Selection Marquee
From the top menu, choose Select and then choose Select None.



13/ Duplicate The Background Layer
Now, (again) Duplicate the Background Layer by right-clicking over it and selecting Duplicate Layer from the drop-down list.
 


14/
Then from the Toolbox, ensure the Rectangle Select Tool is active .

Now, still working on the Background
Copy #2 Layer. Drag out your third panel - as illustrated below.

Important: Resize The Rectangular Marquee
After you have dragged out your third Rectangular Shaped Marquee, please refer to the Size
you wrote down earlier. Then (from the Rectangle Select Tool’s Options Box), clear the Size values already there, and type in the same values as the first panel, in my case this is 250 X 534. Your second Rectangular Marquee will automatically resize itself to match your new (Size) values.
 


Reposition The Rectangular Marquee
You can reposition the Rectangular Marquee either by left-clicking and dragging it to a different position. Alternatively, you can nudge it into position pixel by pixel by tapping your Keyboard’s Arrow Keys.





15/ Invert The Selection Marquee
From the top menu, choose Select and then choose Invert - Ctrl then I.



16/
Now, still working the the Background
Copy #2 Layer: from the top menu, choose Edit and then choose Clear. Alternatively, tap your Keyboard’s Delete Key

                        

Tip
Now is a good time to save your Layered Image as a
GIMP XCF File.

17/
Remove The Selection Marquee
From the top menu, choose Select and then choose Select None.





Congratulations, you have now created three (triptych) panels, and you are ready for the next step.

18/
Activate the Background Layer.



19/ Enlarge The Background Canvas 
Then from the top menu, choose Image and then choose Canvas Size. And from the subsequent Set Image Canvas Size dialogue box, clear the values already there, and then type in new Height and Width Values. Then click the Centre tab - as illustrated below.



Clicking the Centre tab centralises your image, and changes the Width dimension. Now, complete the canvas enlargement by clicking the following Resize tab.



Note
Height
and Width values are entirely dependent on your image’s size and the size of the frame you are seeking. My values work well with my Start Image. However, when working with your own, it’s important to experiment with different Width and Height values and discover the correct dimensions for you.



20/ Delete The Background Layer
Right
-click over the Background Layer and choose Delete Layer from the subsequent drop-down list. You will now be left with just your three panel Layers - as illustrated below.



21/
Now, activate the Move Tool .

And drag each panel to their final positions. Remember, you can nudge each panel into position using the Keyboard Arrow Keys.



22/
Then activate the Crop Tool . (
Crop Tool Tutorial).

And drag out an even-sized crop bounding box around your three panelled image. Then
left-click once over the image to complete the Crop. 

Undo Note
If you make a mistake when applying the Crop Bounding box, press Ctrl then Z to return your image to a previous stage, and then reapply the Crop Tool.

After you have cropped your image to size - as illustrated below; you are ready for the next step.
 


23/
Now, create a New Transparent Layer - and drag it to the Bottom of the Layer Stack.



24/
Then set the Foreground Colour Swatch to a colour you would like your frame to be -
I am choosing Black. Then activate the Bucket Fill Tool: (and still working on the New Transparent Layer); left-click over your image to fill it with the Foreground Colour Swatch.

        

 



Tip
Now is a good time to save your Layered Image as a GIMP XCF File.

Note
Before continuing, ensure the three panels are in their final positions.

25/ Create Three New Transparent Layers
It’s time to stroke each panel with colour; however, first create Three New Transparent Layers. And then place a Transparent Layer beneath each Panel Layer - as illustrated below.



26/ Alpha To Selection & Add A Selected Border
Now, right-click over a
Panel Layer. And from the subsequent drop-down list, choose Alpha to Selection. Then from the top menu, choose Select and then choose Grow. And from the subsequent Grow Selection dialogue box, enter a Grow Selection By size of your choice, (a stroke/frame size) - and then click OK

The active Panel will now be stroked by a Selection Marquee - as illustrated below.

           

27/ Stroke The First Panel With A Colour
Activate the Transparent Layer beneath the Panel Layer - as illustrated below. 
And set the Foreground Colour to a contrasting Colour - I am selecting White. Then activate the Bucket Fill Tool - and left-click over the Selected Panel to fill it with the Foreground Colour

          

28/ Stroke The Second And Third Panels With Colour
Now, stroke the second and third panels with a colour of your choice - just as you did with the first panel back in Chapters 26 and 27
 


Tip: Merge Together (Merge Down) A Panel With It’s Underlying White Filled Layer
If you prefer, you can Merge Down each Panel Layer with its underlying Whited Filled Layer. To to this, right-click over each Panel Layer (one at a time): and then choose Merge Down from the subsequent drop-down list. (Once merged, you can tap each panel into position using the Arrows Keys, if needed).



29/ Remove The Selection Marquee
From the top menu, choose Select and then choose Select None.



Tip
Now is a good time to save your Layered Image as a
GIMP XCF File.

30/ Flatten Image
To finish, from the top menu, choose Image and then choose Flatten Image.



31/
Congratulations, your Triptych Picture Frame is complete,
and it is ready to save.

Sharpen Tip
To create extra impact, apply a
Sharpening Filter of your choice - Filters then Enhance.

Wendi E. M. Scarth. 
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