I use a lot of sticky notes in my publishing workflow. Typically, I type out all of my questions in a separate document (like a Google doc, or a draft email), and then when I am ready to send a proof to the client, I put my questions into the PDF as sticky notes. The problem is, when I copy and paste text into a sticky note, it is never the same size as the default sticky note font settings. And that just looks tacky.
Now, make a sticky note and click on it. See how the information in the Properties bar reflects your sticky note? That's because the Properties toolbar is contextual, and its options will change based on what you have selected.
Now, select the text within the sticky note. See how the Properties Toolbar options change? Now the toolbar says, "Pop-Up Text Properties."
Here is where you can reduce the size of you font. The third button from the left, when you hover over it says: "Click to make the text smaller in the selected typewritten text."
Interestingly enough, you can only edit the size and color of the sticky note text when you click on the sticky note as described above. You can edit the content of the text using the comments tab at the bottom, but you apparently cannot edit the font typeface. See how the text is highlighted in the comments tab, but the Properties toolbar still says "Sticky Note Properties"? What's weird is that when you are editing the Pop-up text Properties, you can still change the color of the sticky note (though none of the other sticky note attributes).
The difference between editing the font properties of a sticky note, versus editing the sticky note itself would sort of be like editing text properties within a frame in InDesign, versus editing the frame itself. The frame is the container for the text. Likewise, in Acrobat, the Sticky Note is the container for the text.
I am still working on figuring out how to change the typeface within a sticky note. From what I've read online, everyone else that uses sticky notes is also still trying to figure this out. If you know how, please post a comment and let me know.
I thought Acrobat had some method for specifying typeface in sticky note (Because if I paste in serif type from an InDesign document, the type comes in not only with a serif typeface, but also with the paragraph indents from the InDesign document.)
But click away, and then click back on the sticky note. POOF! The serif typeface and indents magically disappear. But the font is still smaller than the standard sticky note default.
Weird! One last thing, I think the Acrobat team should coordinate their dictionaries with the InDesign team so that InDesign doesn't come as misspelled in a sticky note.
Author edit: 7-10-14: Need to change the font size multiple sticky notes at once? Check out my related article: How to Globally Change Font Size of Text in a PDF Sticky Note.