@bill63 The entire visual appearance is controlled by CSS, max-width in conjunction with the regions is how it would be handled. Please review the MMM-Multimonth.css file, copy over what you need into the custom.css master file, and change to your needs.
CSS tutorials are available if you’re not comfortable with it.
Even though the project is effectively mothballed due to my time constraints, there is another maintainer on the project who may or may not update the project, so please don’t modify the project files directly.
if you have any questions, feel free to ask, I’m still kinda active on here, as well as our resident experts are always lurking.
– Brendan (author)