3 <img src="/images/ruler.png" alt="Ardour's Ruler">
10 <p> The <dfn>Ruler</dfn> scales the session along time, allows navigating, and
11 can be marked for different uses.
14 One of its main uses is to move the playhead:
15 clicking anywhere on the timeline will bring the playhead at this location in
16 time. Also, using the mouse's scrollwheel while hovering the Ruler will zoom in
17 or out (<kbd class="mouse">⇑</kbd>/<kbd class="mouse">⇓</kbd> ).
20 The Ruler is made of a succession of rows, each having a special role related to
21 time. Adding or removing rows can be done by <kbd class="mouse">right</kbd> clicking
22 anywhere in the ruler's header on the left, and ticking any of:
26 <tr><th><dfn>Mins:Secs</dfn></th><td>scaling the session with the Mins:Secs:mSec notation</td></tr>
27 <tr><th><dfn>Timecode</dfn></th><td>scaling the session with the Hours:Mins:Secs:Frames notation</td></tr>
28 <tr><th><dfn>Samples</dfn></th><td>scaling the session with the sample number notation</td></tr>
29 <tr><th><dfn>Bars:Beats</dfn></th><td>slicing the time according to the time signature of the Meter</td></tr>
30 <tr><th><dfn>Meter</dfb></th><td>shows the time signature. It can be changed along the timeline, by <kbd class="mouse">Right click</kbd> > <kbd class="menu">New Meter</kbd>. The Bars:Beats ruler will reflect the change.</td></tr>
31 <tr><th><dfn>Tempo</dfn></th><td>shows the BPM. It can be changed along the timeline, by <kbd class="mouse">Right click</kbd> > <kbd class="menu">New Tempo</kbd>. The Bars:Beats ruler will reflect the change.</td></tr>
32 <tr><th><dfn>Range Markers</dfn></th><td>allow to create and modify ranges directly on the Ruler.</td></tr>
33 <tr><th><dfn>Loop/Punch Ranges</dfn></th><td>are special kind of ranges designed to be played as a loop and to do punch recording, i.e. recording on a precise section of time, respectively.</td></tr>
34 <tr><th><dfn>CD Markers</dfn></th><td>are markers designed to be used while creating a recording that has to be split in time, as an audio CD</td></tr>
35 <tr><th><dfn>Location Markers</dfn></th><td>is meant to receive any kind of marker, user generated or from Ardour itself.</td></tr>
36 <tr><th><dfn>Video Timeline</dfn></th><td>shows thumbnails of the <a href="@@video-timeline-and-monitoring">video</a> in the timeline</td></tr>
40 Most of the operations on the markers are described in <a
41 href="@@working-with-markers">Working with Markers</a>, while the Meter,
42 Tempo, Bars:Beats and Timecode use are described in <a
43 href="@@tempo-and-meter">Tempo and Meter</a>.