emacs zoom in/out globally

Question

I know that I can zoom in/out using C-x C-+, but this applies only to the current file. Once I open another one, the text goes back to the default value and it\'s really tiresom

Answer 1

Its possible to scale all text (including status-line & line-numbers) using a little mode that handles this exact problem: purcell/default-text-scale. It's available in Melpa.

This scales all text to avoid text scale mismatch such as line-numbers of fill-column indicator being offset incorrectly.

The other answers here either don't work for new buffers or require too much manual intervention.