manual/include/zoom-controls.html
2022-11-08 13:11:27 +01:00

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<figure class="right">
<img src="/images/toolbar-zoom.png" alt="Editor toolbar's zoom">
<figcaption>
Editor toolbar's zoom
</figcaption>
</figure>
<p>
The zoom controls allow to navigate the session along both the time
and track axes. The controls are described from right to left :
</p>
<h2 id="zoom-along-time-axis">Along the time axis</h2>
<p>
The drop down <em>Zoom Focus</em> (<kbd class="menu">Playhead</kbd>
by default) menu allows to select a focus point for the zoom, i.e.
the center of the zoom, to choose amongst:
</p>
<ul>
<li><dfn>Left</dfn> of the screen</li>
<li><dfn>Right</dfn> of the screen</li>
<li><dfn>Center</dfn> of the screen</li>
<li><dfn>Playhead</dfn></li>
<li><dfn>Mouse</dfn></li>
<li><dfn>Edit Point</dfn> as set in the <a href="@@edit-point-control">Edit point</a> control.</li>
</ul>
<p>
The two zoom buttons (<kbd class="menu">&minus;</kbd> and <kbd
class="menu">&plus;</kbd>) use this zoom focus to zoom out and in
respectively.
<p>
<p>
The <kbd class="menu">[&nbsp;]</kbd> <em>Zoom to session</em>
button is a handy shortcut to zoom out or in until all the session
(as defined by its <a href="@@working-with-markers">start/end
markers</a>) fits horizontally.
</p>
<h2 id="zoom-along-track-axis">Along the tracks axis</h2>
<p>
Two buttons <kbd class="menu">Shrink tracks</kbd> and
<kbd class="menu">Expand tracks</kbd> reduce or expand the vertical
size of the selected tracks. If no track is selected, all the
tracks will be shrunk or expanded each time the button is pushed.
</p>
<p>
Last, the dropdown menu (<kbd class="menu">*</kbd> by default)
allows changing the number of visible tracks to fit vertically on
screen.
<p>
<p class="note">
There <em>is</em> a minimal track height to keep it visible, so
according to the vertical screen size, some high number can have no
effect.
</p>
<p>
Besides numbers that correspond to the number of tracks to show,
there are two special choices:
</p>
<ul>
<li>
<dfn>Selection</dfn> that focus on the selected tracks. If
the selected tracks are not contiguous, the unselected tracks
inbetween will be hidden, see the <a
href="@@the-tracks-and-busses-list">Track and Bus list</a>.
</li>
<li>
<dfn>All</dfn> that fits all the tracks of the sessions
vertically (provided there's enough screen estate).
</li>
</ul>