I'm new to LaTex and I'm setting a book I wrote some time ago; a collection of tunes, each with a short paragraph or two of text. I've scanned the music, rather than typesetting it in MusixTex, because I originally hand-wrote it, and I like the look of it as it is.
I'm setting in A4:
The width of the staves should be 18.7cm, or 530pt. I am happy to leave the text at its default margins, and I certainly don't want to make it as wide as the music. Unfortunately, the images are not always exactly the same width as each other, because the scans were trimmed and there is a varying amount of matter to the left and right of the staves. This means I need to adjust the width and position of each image individually to make sure the staves are of consistent width, and positioned correctly.
What I'm trying to do is to insert each image between its chapter heading and the text in such a way that it is consistently placed and sized, taking into account left and right pages.
What I need, effectively, is a pair of guides for the images which are independent of the text margins. I was hoping I could use a box with a visible border, fixed at 530pt width, put the image inside that, move and resize the image appropriately within the box, then turn off the visible border when I'm happy. Or, just add a pair of vertical rules 530pt apart, positioned to take into account odd and even pages. But I haven't managed to work out how to do either of those things.
Inserting, placing and resizing the images are all fine, I just can't work out how to know exactly where to put them!