Change font size whilst running?

[mxmilkiib]

Maybe a hotkey to increase and decrease the size?

[xlucn]

Although this might be technically possible, since fzf have some kind of key binding options (I am not sure actually), but this is not a necessary feature for font preview.

My thought is, we can adjust the font size through command line arguments. Once the font size is suitable, it never needs changing during the program running, since the preview text and font size are pre-defined already.