This is a Houdini tool that lets you toggle stored display flags in similar fashion to Quickmarks.
Select nodes, press Ctrl+Shift+1, 2, 3, 4, or 5
Change their flags to something else
Press Shift+1, 2, 3, 4, or 5 to restore previously selected nodes to their stored flag states (they don't need to be selected anymore at this point).
NOTE: This package uses a new hotkey format introduced in H20.5. These hotkeys are set on shelf tools and can be rebound manually on older Houdini versions.
You need to enter the radial menu panel and find the tool in the Network Editor category and assign a hotkey to it.
You can then use it in any network pane just like the Quickmark radial menu.
Settings are available in the shelf tool. They allow you to disable/enable Quickflags to trigger Quickmarks as well.
Currently the tool only supports Display, Template, Bypass and Render flags.
Download the latest release or the current source code.
Install as a package by first editing quickflags.json and changing the path to where you store this package (for example "hpath": "C:/mypackages/quickflags.json"), then copying it to your $HOUDINI_USER_PREF_DIR/packages/quickflags.json
If installed correctly, you should now have a Quickflags shelf tab available.