Hello @linneart ,
A custom font can be enabled by an admin by using custom JavaScript or CSS in the Theme Editor. Please note that Instructure doesn't provide support for these types of customizations.
Also, there's no scientific evidence that OpenDyslexic actually improves readability for users with Dyslexia.* https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5629233/
OpenDyslexic was compared to Arial and Times New Roman in three reading tasks: (a) letter naming, (b) word reading, and (c) nonsense word reading. Data were analyzed through visual analysis and improvement rate difference, a nonparametric measure of nonoverlap for comparing treatments. Results from this alternating treatment experiment show no improvement in reading rate or accuracy for individual students with dyslexia, as well as the group as a whole.
(emphasis added)
*I am not a research scientist 
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