how do you use the pluralspace custom themes? i've been trying to figure it out for a bit now with no luck ^_^"
So first if you or anyone is having trouble finding where to get to it.
You need to go to your PluralSpace account profile in the top right corner. (Shown below)
After clicking that, a small drop down menu will show up. Just click "Appearance". 😀
You will then land on the "Appearance" page. This page changes your theme for all your systems not just one. It's basically how you will view the site no matter where you go on it.
You will need to scroll all the way down to the very bottom and input any code you've been given into the "Import Theme" section and click the "Apply" button.
Now don't go anywhere. We aren't finished. Importing will only put the theme into the "Preview" area.
This is where you can preview some of how it will work and look. I say some, because there are many colors that are used in other places or even for text that the color selection doesn't warn you about.
Your last step is simple but can be easily forgotten. You just need to hit the "Save Theme" button and it will fully apply to PluralSpace.
Hopefully this helps you and others.
Extra: You can also choose fonts, spacing, and how round the corners of things are in the Custom Theme area!