Tips and Necessity of Using Eraser in Krita

[AhabGreybeard]

Hello @Lojith_Vinsuka and welcome to the forum

Set Eraser mode and Toggle eraser preset are two separate things and they should not have the same keyboard shortcut.

Set eraser mode forces the currently used brush preset to paint in Eraser blending mode.

Toggle eraser preset makes krita believe that the user is using the ‘eraser end’ of a stylus that has two ends, a ‘painting tip’ and an ‘eraser tip’.
This can be useful for people who do not have a stylus with an ‘eraser tip’.

Here is a topic that discusses this:
Toggle Eraser Preset - How do I choose what's an eraser?