diff --git a/TODO.md b/TODO.md
index 44c97c8..85f42d0 100644
--- a/TODO.md
+++ b/TODO.md
@@ -57,3 +57,8 @@
 - [ ] Vertical scrolling within the "control widgets" group
 
   Currently if there is not enough vertical space, the "Controls" and "Search" boxes will overlap the footer with the "Show Controls" button, and there is no way to access that, or any controls that are out of view. The footer should always be visible, and anything on top of it should reflow within the available vertical space, with a vertical scrollbar.
+
+- [ ] Combine "Expand by kind" and "Collapse by kind" (if any lines belonging to the clicked group are collapsed then a click expands all; if all are expanded then a click collapses all)
+- [ ] Filter channel lines by source/target memory (or memory kind)
+- [ ] Support sorting of channels by destination memory
+- [ ] Re-number different kinds of processors/memories starting from 0 (e.g. first GPU should be g0 rather than g7)