The history palette to hold a maximum of 200 Entries with a time limit of 31 days can be
considered as a limitation.
Solution
A new option to pin entries has been introduced starting NX 1899 Series
You can pin an entry which will stay without time limit. The Pinned entry will then
be placed in the pinned directory in the History palette.
Then upon request, you can unpin entries when you don't need it anymore.
Notes and References
https://docs.plm.automation.siemens.com/tdoc/nx/1899/nx_help/#uid:xid1128416:index_nx_interface:palettes_ov:palettes_system
Hardware/Software Configuration
Platform: all
OS: n/a
OS Version: n/a
Product: NX
Application: SYSENG
Version: V1899
Function: UI_TOOLS
Ref: 002-8171457