Center map with multiple paths and elevation profile color

For a map where i load 3 gpx files to show, it does not seem to center it based on the GPX/paths. How can I solve this?

Furthermore, the elevation profiles have themes predefined. Where can I add a theme with the color that I want?
 

Hi.
If you show all 3 paths on one map, then switch off centering by path and just set appropriate map center and zoom.
Moreover, if you will show all paths, as I remember right, I will not show elevation diagram.

As for theme - on elevation tab for paths you can select predefined theme. That themes are built in library, which I use. A didn't check whether I can specify my own styles.