The space charts show the space used over time.
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Log Files Chart Title Description
Log File Space: Megabytes Log Files Space displayed in megabytes
Log File Space: Percent Log Files Space as a percentage of disk space
Virtual Log Files Count Count of the number of Virtual Log Files over time as sourced from vlfcount procedure SQLVirtualLogFilesCount

Click the arrow to the right of the chart title to change the chart on display.

The log files displayed can be restricted by clicking the database(s) of interest in the Databases grid. They can then be further restricted by clicking just the log files of interest in the Log Files grid. Hold down the Shift key to select a block of multiple records or the CTRL key to select individual records.