This tutorial demonstrates how to resize an image.
You can always resize your image by going to the tab “image” then “image size” (or Alt + Ctrl + I).
Here is the table that will appear:
1 – The height and width of the current picture (before the change)
2 – Enter here the height and width that you prefer for your image
3 – The new resolution
4- If you select this option, the height and width will change
synchronously, and if you uncheck the second option, the resolution and
the volume will change (if the resolution increases, the volume
decreases).