To make an image for the Event information, you need to take some screenshots in the game.
Here's a random route that I created to use as an example.
If you took the screenshots, loading them to painting tool (eg, CLIP STUDIO, Adobe Photoshop, MediBang paint, etc,.
Like a below image, hide all layers except only the route screenshot.
Create a new layer, and draw a route with bucket tool on the layer.
You can draw some of the uncolored sections with pen tool.
Then, we have completed the images for the wonderful convoy! (I painted the background for visibility.)
If you mark the starting and ending points, and if you show more information, you can create a much more complete image.
Once again, hide images other than this image.
Create another new layer, and draw a will not be used route with bucket tool on the layer.
If you hide all the layers except the ones you created, you can get these result.
After this, you can decorate it as you want!
Here's an example image I made.
I hope my tutorials will help as many people as possible. Feel free to let me know if you don't understand or if there's a much better way !