Depending on my view, I frequently want to change the font size, but the existing solution (ctrl+=) zooms the entire interface. There is no solution to bind a keyboard shortcut to zoom the font, but a slider in the settings exists, so it is possible.
Simply add the keyboard shortcuts/hotkeys Increase font size, and Decrease font size.
I love Obsidian, the best markdown/text editor ever! 
(I know you can use the mouse wheel, but I want to be able to use the keyboard too).
No response? Weirdā¦ I think this is important. I like my overall system zoom; sometimes I just need the text Iām reading to change size. Iām not trying to zoom everything.
For the record, using Ctrl + Scroll Up/Down will do the behavior you (and I) are looking for, but itās really sensitive and Iād prefer a keyboard shortcut so that I could āstepā the zoom level, the same as you do with System Zoom.
I am shocked that this does not have more votes. Itās infuriating that I can only use the keyboard to change the zoom level and there isnāt even an option to add a shortcut to change the font size. This really feels like an oversight on by the Obsidian team, so itās disappointing that thereās no reply here.
I change the font size multiple times per day, as I sometimes need text to be a bit bigger if someone else needs to read along. It would probably become one of my most used keyboard shortcuts.
itās weird, changing font size is like most basic font editor feature
I have a similar problem as described here:
that I accidentally change the font size with two fingers on the touchpad.
So I would need a keyboard shortcut for the ārestore defaultā button that appears next to the font size slider only when font size has been changed.
This is located under Settings/Appearance/Font/Font size.