Another thing I did was to try to figure out how to get a custom size slide in my Keynote for the base of the planners and notebooks I was designing. In the iPad version of Keynote, there are only two choices for slide sizes, regular and wide. I worked with them, but was disappointed for a couple of reasons.
The regular size would fill the vertical area in Goodnotes, but did not fill the space horizontally. If I used the wide size, it would fill the area horizontally, but not vertically. I wanted to make use off all the space on the screen, and I spent a lot of time looking for a solution to the problem.
There does not appear to be a way to create a permanent slide of a nonstandard size on the tablet version of Keynote.
But I did read that on both the Mac version and the PC version of PowerPoint, it was possible to create custom slide sizes.
I'm a PC person, so I opened PowerPoint and went to work.
Sure enough, if you click on "Design" in the menu bar, there is an option for slide size in the upper right corner. The standard sizes of slides, wide and standard are there, but there is also a "custom" option.
I clicked on that option, and saw that I could make a slide that would fit the space. It took four or five tries, but I finally landed on 14.5" x 9.25". I don't know if those would be the correct dimensions on the Mac version of Keynote, but it's a starting point, if that is the program you use.
After creating the slide, I exported it as a PowerPoint file to my Dropbox, then grabbed it on my iPad, importing it as a Keynote file into the Keynote app.
One thing I noticed is that while using a slide template created in PowerPoint, it has brought along some of the attributes of PowerPoint. The color options are a little different, as are the colors of the shapes. When I go back to a slide created inside Keynote, the old colors and shapes are there. That has not been a problem for me at all, so I have no complaints.
I'm just happy to have found a way to create a base for a planner that makes maximum use of the screen size in GoodNotes.