Selecting a group shows the entries contained in that group. Selecting multiple groups shows the entries contained in any group (union) or those entries common in any selected groups (intersection), depending on the current settings. All this is explained in detail below.

The group interface is shown in the side pane on the left of the screen. It can be toggled on or off by pressing `Alt + 3` or by the menu **View → Groups interface**. The interface has several buttons, but most functions are accessed via a context menu (i.e. a right-click). Drag-and-drop is also supported.

To create a group and manually assign entries to it, press the **+** button, enter a name for the group, then press (leaving all values at their defaults). Now select the entries to be assigned to the group, and drag-and-drop them to the group (or use **Add to group** in the context menu of the group interface). Finally, select the group to see its content. Only the entries you just assigned to the group should be displayed in the entry table.

To test this, create two groups having some entries in common. Click the **Intersection/Union** button and make sure that **Union** is selected. Now select both groups. You should see all entries contained in any of the two groups. Click again on the **Intersection/Union** button and select **Intersection**. Now you should see only those entries contained in both groups (which might be none at all if groups do not share entries, or exactly the same entries if both groups contain the same entries).

Just like directories, groups are structured like a tree, with the group _All Entries_ at the root. By right-clicking on a group and selecting **Add subgroup**, you can add a subgroup to the selected group. The **+** button (near the top of the pane) lets you create a new subgroup of the group **All Entries**, regardless of the currently selected group(s). The context menu also allows removing groups and/or subgroups, and to sort subgroups alphabetically. Moving groups to a different location in the tree can be done by drag-and-drop.

The properties of a group can be defined in the 'Edit group' dialog window (the same window is displayed when creating a new group). To modify the group properties, right-click on the group name in the group panel and select **Edit group** in the context menu.

Defines the name of the group, as displayed in the group panel.

By default, a group is **independent** of its position in the group's tree: When selected, the table of entries shows only the group's content (all of its entries).

You can create a group for your references about music, and then subgroups about the music styles (classic, jazz, rock, etc.). By setting the group "Music" as _union_, when you subsequently add references to a subgroup, they will automatically appear in group "Music" as well (without additional action).

The "groups" column is displayed by default. To remove the "groups" column, go to **Options → Preferences**, tab **Entry table**, and click on the bin icon next to the item "Groups". To add the "groups" column, select the "Groups" item in the drop-down menu, and click on the **+** button located to the right of the drop-down menu.