Hi there,
I was experimenting with the layer blending modes in Krita, so I was checking and unchecking boxes in the manual blending mode options, but now I can't remember what the default settings were. I think my "Normal" layer mode is messed up now, because the colors look strange. Is there any way to either reset the layer modes, or to find out what boxes to check? Any help with this is greatly appreciated!

The Normal blend mode is in the Mix group of the drop down blend mode menu of the Layers docker. Expand the Mix group listing by clicking its small triangle icon to the left and then click on the Normal option.

Note that the tick box is to add the blend mode to the Favourites group at the top of the menu list (for your later convenience) if you want it there. To apply the blend mode, you should click on the word itself. Sometimes, you have to click the word twice for the blend mode to be applied.

Ohhh, I see! Thank you so much, that helps a lot!