XS_COMPONENT_CATALOG_COMPACT_THUMBNAIL_SIZE
Category in Advanced options dialog: Modeling properties
Use this advanced option to adjust the size of thumbnails to between 16 and 96 pixels in the compact view. The default is 40.
This advanced option is user specific and the setting is saved in options.bin under the user folder, for example, in C:\Users\<user>\AppData\Local\Trimble\Tekla Structures\<version>\UserSettings. Restart Tekla Structures to activate the new value.