Text font changes in slides

I searched for answer but only found when change in notes section and narration.  Mine changes from when I type it to when I click out of it.  I copied and pasted what I am talking about.  It fits in the caption when I am typing it and then when I click out of it, it gets bigger and darker and not the way I want it to look.  What am I doing wrong/how can I fix it?

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