I've come across many similar questions relating to similar projects on Stack Exchange Meta. Despite this, I still can't quite translate to my own project and problem.
I believe this is fundamentally a math question. I struggle desperately with math and logical thinking, so can't work out what calculations are needed or whether this is possible for my document.
I have created a z-fold document. I calculated a layout grid using the following dimensions:
Each individual page is 99mmx210mm I set a margin for each page to 1cm (10mm) I want to divided the space within the margins into 9 rows and 3 columns. I've set a gutter width between each row and column to 2mm (I wanted it to be small, as I have a lot of content to place).
This is what I am left with - all good!
I then now want to set up the baseline grid to fit with this layout grid, as I will be using a fair bit of text in the design.
As my copy will be set to a point size of 10 (10pts) I set the baseline grid increment to 10 pts also, lined up within the margins.
I believe I am struggling with logical maths equations or something. Any insight or formula explanations that would help me both with this project, and for calculating future projects, would be appreciated.
As you can see, I haven't had desired effect?