Unable to type in lowercase.

Try a different font.

Some fonts are only uppercase.

what adobe app?

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in the future, to find the best place to post your message, use the list here, https://community.adobe.com/

p.s. i don't think the adobe website, and forums in particular, are easy to navigate, so don't spend a lot of time searching that forum list. do your best and we'll move the post if it helps you get responses.

<moved from using the community>

Your message here has lowercase, so I don't understand your problem

When you post a question you always need to tell the Adobe program you are using
There are MANY programs in a full subscription, plus other non-subscription programs
Please post the exact name of the Adobe program you use so a Moderator may move this message to that forum