Can I make the alert box fit the text instead of it having a scroll bar?

I have one situation where the alert box needs to have about 5 or 6 rows of text to confirm an action.

The user is required to compare fields in the record view to those five or six lines and confirm they are correct.

In v12 (yes, I finally upgraded PRD to v12 Ent and I'm working on catching up to v14) the alert box is much smaller and has a scroll bar so the user has to scroll through the tiny alert box.

I'm ok with code changes and would like the box to adjust to the size of the message without scrollbar.

Any suggestions?

Thanks,

Francesca