This is a reference plaque that I use to remind me which direction to turn either the Z-Axis lead screw to raise/lower the gantry or to raise/lower the print bed by adjusting the knobs.
Being a beginner 3D-printer, it helps when you're quickly trying to adjust the heights.
This fits on top of the X-Axis roller cover on the Ender. It's just attached using double sided tape. I'm sure you can use it on other printers if you find a suitable spot.
I printed this as a single colour, but the version I use, is with a second colour added in. In Cura, figure out which layer the text is starting and do a Filament change or Pause at Height.
Edit: I've added a second version with the circular arrow that might be visually easier to comprehend. Shown with filament changed at layer 10.
Printed in PLA
0.2mm layer height
No supports, rafts, brims, skirt optional.
Final size is 32x32x3mm and it takes about 15 minutes to print.