I am using ImageMagick (under Linux) to make a 3x3 montage of nine PNGs which I have, and label them. Desired is PDF output with vectorized fonts as the labels. I use this command:
montage -label '%t' *.png -geometry +3+3 out.pdf
The result looks exactly like I want it to be, but the labels of the panels are actually bitmaps! I.e. if I zoom into the PDF I can see that the label text consists of pixels, and I can not further search for the labels etc in the resulting PDF.
Is there any way how I can make it so that the labels are vectorized, proper fonts in the PDF? If yes, how do I specify this?