Change input labels

I have a Marantz 2250b and the labels on the input dial are not related to my system at all. For example my phono stage goes to Aux and my DAC goes to Tape 1. My DAC has three inputs (computer, airport, and chromecast) labeled 1, 2, & 3. So no indication of what is what.

I can keep things straight because I set it up by my family gets frustrated.

Are there any methods for re labeling the faceplates of these devices that don’t look like $#! +?
You have vintage quality unit and want to replace labels??
I'd rather use some stickers with notes, but would never touch neither faceplate or rear panel. 

Ideally, I was thinking of small labels that could be removed with no damage alá the ubiquitous label makers - only much, much smaller.

No permanent Alterations. 
I have a Brother P-touch label maker, model PT-D210, that accepts label tape in 1/4, 3/8 and 1/2 inch widths and three font sizes. The tape is available in a wide variety of colors for both the tape and the print. Maybe either white or black print on either black or matte-gray tape would work? Or if you have a Jadis amp, black on gold would be a nice touch. Cutting out the little labels would be a bit fiddly but you’d have to do it only once.
Can you adjust the font size regardless of the tape size? 
1/4 inch seems to large but you mentioned cutting text out? 
Here we see yet another problem with digital. No digital, no problem. The answer is staring you in the face.
Not really. My phono stage uses tubes. I wouldn't use the Marantz phono pre amp regardless. 
The only tape I have is 1/2 inch wide but when I select the smallest font size the letters are 1/8 inch high.

Why not rearrange what’s plugged into the inputs in the rear so they match what the faceplate shows in the front? No labels needed!
Yogiboy, when my receiver was made the was no such thing as a CD player let alone a DAC that handles other types of digital inputs. Also, I don't want to use the on board phono stage (labeled phono on the faceplate) so my external phono stage must be plugged into some other input, like Aux.