A pop-up "Resample" or "RESIZE" window will appear. Click
your mouse within the first of the two upper boxes on the right-hand
side of the pop-up window (see the screenshot) - this box contains
a number that represents the current width of your image (in pixels).
Delete the current number and enter 350 in its place. Don't
bother with the second number (height), as the program will adjust
this upon saving. Critical: Make sure the box marked "Maintain
Aspect Ratio" is checked. Then Click "OK." Everything
else will adjust automatically.
Step 8: Choose "Save As" from
the "FILE" menu.
Now it's time to save all of your work. Move the mouse
to the "FILE" menu, click, scroll down and select "Save
As," which will take you to the next pop-up window....