Multiple search fields
There could be an option to add/remove search fields in the graph settings (the added fields could be grouped together at the top).
You could choose all search fields to be active at the same time (with an AND operation between them).
eg
Field 1: #tag1
Field 2: #tag2
would be equivalent to
Field 1: #tag1 #tag2
You could choose only one field to be active at a time. Next to each search field, there could be an option to close it and an option to disable/select it (which would become visible wen you hover over the field).
There could an option to switch between two selection modes:
- Checkbox mode - a checkbox appears next to each search field; this would allow you to enable/disable individual fields.
- Radio-button mode - a radio button appears next to each field; this would allow you to select one field at a time, thus quickly switch between multiple searches.