3 <img src="/images/ruler.png" alt="Ardour's Ruler">
11 The <dfn>ruler</dfn> scales the session along time, allows navigating, and
12 can be marked for different uses.
15 One of its main uses is to move the playhead: clicking anywhere on the
16 timeline will bring the playhead at this location in time. Also, using the
17 mouse's scrollwheel while hovering the ruler will zoom in or out
18 (<kbd class="mouse">⇑</kbd>/<kbd class="mouse">⇓</kbd> ).
21 The ruler is made of a succession of rows, each having a special role related
22 to time. Adding or removing rows can be done by <kbd class="mouse">right</kbd>
23 clicking anywhere in the ruler's header on the left, and ticking any of:
28 <th><dfn>Mins:Secs</dfn></th>
29 <td>scaling the session with the Mins:Secs:mSec notation</td>
32 <th><dfn>Timecode</dfn></th>
33 <td>scaling the session with the Hours:Mins:Secs:Frames notation</td>
36 <th><dfn>Samples</dfn></th>
37 <td>scaling the session with the sample number notation</td>
40 <th><dfn>Bars:Beats</dfn></th>
41 <td>slicing the time according to the time signature</td>
44 <th><dfn>Time Signature</dfb></th>
45 <td>shows the time signature. It can be changed along the timeline, by
46 <kbd class="mouse">Right-click</kbd> >
47 <kbd class="menu">New Time Signature</kbd>. The Bars:Beats ruler will
48 reflect the change.</td>
51 <th><dfn>Tempo</dfn></th>
52 <td>shows the BPM. It can be changed along the timeline, by
53 <kbd class="mouse">Right-click</kbd> > <kbd class="menu">New Tempo</kbd>.
54 The Bars:Beats ruler will reflect the change.</td>
57 <th><dfn>Range Markers</dfn></th>
58 <td>allow to create and modify ranges directly on the Ruler.</td>
61 <th><dfn>Loop/Punch Ranges</dfn></th>
62 <td>are special kind of ranges designed to be played as a loop and to do
63 punch recording, i.e. recording on a precise section of time, respectively.</td>
66 <th><dfn>CD Markers</dfn></th>
67 <td>are markers designed to be used while creating a recording that has
68 to be split in time, as an audio CD</td>
71 <th><dfn>Location Markers</dfn></th>
72 <td>is meant to receive any kind of marker, user generated or from Ardour
76 <th><dfn>Cue Markers</dfn></th>
77 <td>allows triggering entire cues from the grid in the <em>Cue</em>window</td>
80 <th><dfn>Video Timeline</dfn></th>
81 <td>shows thumbnails of the <a href="@@video-timeline-and-monitoring">video</a>
87 Most rulers allow placing markers to serve a specific purpose: mark a point in
88 time, define a loop range, or something else entirely.
92 Most of the operations on the markers are described in <a
93 href="@@working-with-markers">Working with Markers</a>, additional information
94 on Time Signature, Tempo, Bars:Beats, and Timecode is available in the
95 <a href="@@tempo-and-meter">Tempo and Time Signature</a> chapter.