Zoom in to your image so the pixels you want to touch up are clearly visible.
On the ribbon, click
Raster Tools tab Edit panel Touchup.
The Touchup toolbar is displayed.
Click the touchup tool shape you want to use:
Square
Round
Diagonal
Optionally, use the controls on the Touchup toolbar to modify your brush, adjust the display, and undo or redo lines during your editing session.
Tip: If Dynamic Input is active, you may see a tooltip area that moves with your cursor. Click DYN at the bottom of the main window to turn this feature off or on.
If you are satisfied with the touchup, click
to end the session and save the results; otherwise, click
to erase the touchup and start again.