Use of the Ubuntu plotting tool gimp

1: Modify the image size

• 1. Zoom Selection: menu "image-resize image"
• 2. image size setting: Set your width and height values.
• 3. If the image length/width ratio is set, click the unlock button.
• 4. Click OK.
• 5. Save the result of the package, such as the PNG format.

2: Create a rounded corner icon

• 1. Select All: Ctrl +
• 2. Selection of rounded corners: select-rounded corner rectangle"
• 3. Reverse Selection: Ctrl + I
• 4. Add an alpha channel to the image: Choose "layer-transparency-add alpha channel"
• 5. Press delete
• 6. Save the results, such as in PNG format.