The Ram chart window (shown below) allows you to monitor the memory usage of L3DT, including L3DT's total allocation (green line), the map-only allocation (yellow line), the out-of-RAM (paged mosaic) map allocation (red line), and the remaining available RAM (white line). This window is accessed by selecting the 'Utilities→Ram chart…' menu option.
The status text at the bottom of the window includes additional information about the system's current memory status, as summarised below:
| Label | Description | 
|---|---|
| Maps | The amount of RAM currently used by L3DT for map data (yellow line). | 
| Paged | The amount of map data that L3DT currently has paged to disk (red line). | 
| Working set | The total amount of RAM currently used by L3DT (green line). | 
| Avail (virt.) | The amount of RAM that the system reports is available to L3DT (white line). |