This GIMP (GNU) tutorial demonstrates how to produce a Letterbox Type Seascape. To work along, you are welcome to download the Start Image I am working with Here. Unzip the file and open the image onto GIMP’s workspace.
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.
Launch GIMP & Organise Its Workspace & Palettes
Open your choice of Start Image onto GIMP’s workspace - File then Open - Ctrl then O.
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).
Now, from the left-side Toolbox, activate the Crop Tool.
Then left-click and drag out a Letterbox Type Bounding Box around your image.
Crop Tool Tutorial Here
And commit the Crop by left-clicking once inside the Crop Bounding Box.
3/ Optional: Desaturation
From the top menu, choose Colours then choose Desaturate.
Then from the top menu, choose Filters then choose Enhance then choose Unsharp Mask. And from the subsequent Unsharp Mask dialogue box, enter the following settings, and then click OK.
Sharpen Images Tutorial
Congratulations, your Letterbox Conversion is complete, and it is ready to save - top menu, then File then Save As.
Wendi E. M. Scarth. Top of Page.