Sometimes you may want to change some attribute for a number of items at once. Instead of opening each individual item for editing, you may use the mass update function for that.
To mass-update some items, do the following:
The Tags option allows to:
User macros, {INVENTORY.*} macros, {HOST.HOST}, {HOST.NAME}, {HOST.CONN}, {HOST.DNS}, {HOST.IP}, {HOST.PORT} and {HOST.ID} macros are supported in tags.
The Preprocessing option allows to replace the existing preprocessing steps on the items with the steps that are specified here.
When done, click on Update.