Add adds a new empty filter entry
Clear clear all filter entries
Save save the filter
Load opens:

Filters can have multiple filter entries

Enable/disable the filter entry

How the filter entry is compared with other filter entries
And: Must match entry
Or + Group: Must match at least one entry in the group

The column you want to filter entry to evaluate
Or All matching all columns

Contains
Does not contain
Equals
Does not equals
Regular Expression
Greater than
Less than

The text to match

Clone the filter (make a copy of it).

Remove the filter entry