In the reports section, the time scale seems to be restricted to minutes with the following settings:

SELECT Timestamp AS Time, tractionSwitch AS Traction, speedcap as Cap
FROM CurrentView
ORDER BY Time

Sample rows from execution results:

8 Jun 2023 2:13:16 PM.619     3861    7500
8 Jun 2023 2:13:16 PM.623     3862    7500

Is there any way to increase the granularity of the graphs by selecting units? The Log entries per minute has a dropdown which is nice, although it doesn't display units smaller than minutes when hovering.

Correct - the graphs will auto-scale the X / Y axis based on the data range to display.  The graph is then drawn to a pre-allocated size and sometimes this can result in a graph that is difficult to read.  Unfortunately, this is not something that we can easily resolve.  It would be better to address this by changing the granularity or graph type.

I also noticed that you are using a line graph which draws a line between two points.  If data is missing for a time range, this can result in 'false' data being shown in the grid as the line does not drop to zero unless an explicit 'zero' value is found.  In this situation, a bar graph may be more appropriate.

Also, you may want to check out the Navigation Reports.  These reports use the same graphing controls and they might help with giving you a better understanding how the underlying controls behave.

Automatically adding a scroll bar to the charts is not going to be possible.  It is very difficult to predict in advance if they are actually needed.

Hope that helps,

Toby