What are the ROI data loading options?

When creating or loading an ROI, CartoScope asks how much data to load immediately. The answer affects load time and browser memory usage.

For a full comparison table, see the ROI Loading Data Options concept page.

Summary

Option	What it loads	Best for
Current-Level Loading	Data at the current zoom resolution only	Large ROIs, initial exploration, avoiding slowdowns
Full ROI Loading	All data at the highest available resolution	Small ROIs, detailed export, complete analysis

When should I use each?

Use Current-Level Loading when:

• The ROI covers a large tissue area.
• You are still exploring and may change the ROI boundaries.
• You want to avoid browser memory warnings or crashes.

Use Full ROI Loading when:

• The ROI is small and focused.
• You need the complete raw pixel/transcript data for export.
• You are running a comparison or differential expression analysis that requires full counts.

Can I change the loading option later?

Yes. You can reload an existing ROI by re-creating it or by using the Load Existing ROI guide to re-import it with a different option.

When in doubt, start with Current-Level Loading

You can always re-load the ROI at full resolution once you have confirmed the boundaries are correct.