[FM Discuss] how to scale images

[joachim heintz]

hi all -

i have a png image in a good resolution and i cannot figure out how to 
adapt it to the text.  when i use the zoom, the visible part gets 
smaller, but the frame remains.  any help?

the image is in 
https://en.flossmanuals.net/csound/_full/#d-frequency-modulation, before 
example 04D11.

is there any general editing guide, perhaps also with some tips about 
style or image resolution?

thanks -
	joachim