would be nice to have a feature to show kilometer marks on the track dislplayed on the Locus screen. Similar to what you can swith on/off in GPSies. This could be a customizable feature (how frequent the marks are displayed, distance between marks, km/miles, etc.) that would also depend on zoom level.
This feature might come in handy if your route/track for several days is just one long line and you would like to understand where you probably be in some hours knowing your average speed (i.e., decide on when/where before sunset you are going to stop for the day and make a camp). For bicyclists this might be especially handy
Global in the app settings/quick settings/map-screen content > easy/quick to toggle
Individual per track (defined in the track style) > more steps to enable/disable, but a lot more flexible. You may enable it permanently for a single track, for recording style, in route planner style, per track group etc.