How to temporarily change font size?

Hi, I'm working with a document that contains phonetic symbols and the default font size I use for coding is a little small. Is there a command in Emacs that allows me to increase the font size but only for the current session? I mean until I exit Emacs.

C-x C-=

Ctrl-Mousewheel for me :)

I use these little functions from Steve Purcell: https://github.com/aaronbieber/dotfiles/blob/master/configs/emacs.d/lisp/init-fonts.el#L37

You can do it buffer-locally by calling `text-scale-increase`. For me, that does not carry over into the next session. I have bound `text-scale-increase` and `-decrease` to `C-=` and `C--`, respectively.

See Emacs Wiki [Changing Font Size](https://www.emacswiki.org/emacs/SetFonts#ChangingFontSize), with its sections [Zoom Buffer](https://www.emacswiki.org/emacs/SetFonts#ZoomBuffer) and [Zoom Frame](https://www.emacswiki.org/emacs/SetFonts#ZoomFrame).

Funny... was just scrolling through some Purcell magic (envrc and exec-path-from-shell related) a few minutes ago. So much respect for Steve's work. 🏆🥳 Is that implementation the ancestor to https://github.com/purcell/default-text-scale? Looks a bit familiar. 🤔 I'm using that at the moment and pretty happy about it. Do you have a particular reason to prefer this over default-text-scale or was it just a matter of "it works and I don't need anything else ATM" 🤷🏿‍♂️?

I suspect that my snippet is an ancestor based on the name; I lifted my code out of Steve's config years ago and I only occasionally use it but it works when I need it so I haven't taken time to consider alternatives. I just learned about `text-scale-increase` from this thread and I don't see why I shouldn't just use that, so I may experiment.

Yes, that code is indeed the ancestor of that package. I use the packaged version myself now. And thanks for the kind words.

That one is great if you just want bigger or smaller text in the current buffer.

The prevailing ethos among emacs users is to ignore the existence of the mouse, but as someone who still occasionally uses it, C-Mousewheel is genius!

I didn't know about the packaged version until just now, so I think I'll delete that spaghetti file I've been self-maintaining :)

That "ethos" is BS IMO. Emacs comes with a lot of thoughtful mouse commands OOTB.

What are some other examples? This doesn't get talked about a lot lol.

See my thread from the other day: https://old.reddit.com/r/emacs/comments/uxh0dy/a_mousedriven_emacs/. I leave out the obvious like the clickable links in *Help* buffer, mouse bindings in *Occur*, *grep*, etc.

I know `text-scale-adjust` really is bound to `C-x C-=` but I cannot bring myself to use that binding, it feels so wrong. I always use `C-x C-+` even though it's harder to type...

Do what your muscles want to do. Bind to `C-x C-+`.

A lot is in the manual. `gdb-many-windows` is a great example of mouse actually doing some very useful things. https://www.gnu.org/software/emacs/manual/html_node/emacs/GDB-Graphical-Interface.html

I don't have to bind it myself, that's also a default binding.

But it's consistent with what I use to zoom my browser windows :D