By clicking on a tab, you can switch between the files to inspect their statistics, and apply [edit actions](./menu/edit) and [tools](./toolbar/) to them.
By holding the <kbd>Ctrl/Cmd</kbd> key, you can add files to the selection or remove them, and by holding <kbd>Shift</kbd>, you can select a range of files.
Furthermore, you can drag and drop the inner items to reorder them, or move them in the hierarchy or even to another file.
## Elevation profile and statistics
At the bottom of the interface, you can find the elevation profile and statistics for the current selection.
### Interactive statistics
When hovering over the elevation profile, a tooltip will show statistics at the cursor position.
To get the statistics for a specific section of the elevation profile, you can drag a selection rectangle on the profile.
Click on the profile to reset the selection.
### Additional data
Using the buttons on the right of the elevation profile, you can optionally color the elevation profile by:
- **Slope** <TriangleRight size="16" class="inline-block" style="margin-bottom: 2px" /> information computed from the elevation data
- **Surface** <BrickWall size="16" class="inline-block" style="margin-bottom: 2px" /> data coming from <a href="https://www.openstreetmap.org/" target="_blank">OpenStreetMap</a>'s <a href="https://wiki.openstreetmap.org/wiki/Key:surface" target="_blank">surface</a> tags. This is only available for files created with **gpx.studio**.
If your selection includes it, you can also visualize: **Speed** <Zap size="16" class="inline-block" style="margin-bottom: 2px" />, **Heart rate** <HeartPulse size="16" class="inline-block" style="margin-bottom: 2px" />, **Cadence** <Orbit size="16" class="inline-block" style="margin-bottom: 2px" />, **Temperature** <Thermometer size="16" class="inline-block" style="margin-bottom: 2px" /> and **Power** <SquareActivity size="16" class="inline-block" style="margin-bottom: 2px" /> data on the elevation profile.