Adobe Premiere Selection Tool
The selection tool is the default tool in Premiere, and is used for many common tasks in the timeline. To select the tool, either click the select button in the toolbox or use the V keyboard shortcut.
To select a single clip or transition, click the clip or transition in the timeline.
To select only the video or audio portion of a clip, hold down the Alt key while clicking the clip.
To select multiple clips, hold down the Shift key while clicking each required clip. Shift-click a clip again to remove it from the selection.
To select multiple adjacent clips, you can drag a selection rectangle (marquee) around all the required clips. Shift-drag to remove parts of the selection.
To select all clips on a track (or multiple tracks), use the track selection tool.