I tried making my own car symbols for the TomTom One 125. I followed the directions and make the background red. The symbols show up on my TomTom but the background is still red instead of transparent like the other symbols. How can I fix that?
Try downloading one of the car symbols from your tomtom into your graphics program. Then use the background red colour to make all the file red. Then draw or paste on the car / object you want to use.
Don't know what graphics program you have so can't do a step by step for you.
Be sure to check that you have used the 'correct red' as opposed to any old red. The instructions call for a very specific 'solid red' (255,0,0 from memory); you have to use the custom colour palette on your graphics program to select this.