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<title>fiv: User Guide</title>
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<h1>fiv: User Guide</h1>
<p class="details">
<span id="author">Přemysl Eric Janouch</span><br>
<span id="email"><a href="mailto:p@janouch.name">p@janouch.name</a></span><br>
<span id="revnumber">version 0.0.0,</span>
<span id="revdate">2022-01-25</span>
<p class="figure"><img src="fiv.webp" alt="fiv's browser and viewer">
<h2>Introduction</h2>
<p><i>fiv</i> is a general-purpose image browser and viewer. This document will
guide you through the application and help to familiarize you with it.
<h2>Controls</h2>
<p><i>fiv</i> is designed with computer mice having dedicated forwards/backwards
and page up/down buttons in mind, such as SteelSeries Sensei series. Ozone Neon
series may also be mapped this way. Your experience may be degraded with other
kinds of devices.
<p>Controls should generally be accessible through the keyboard. Pressing Ctrl+?
will give you a convenient overview of all shortcuts. In addition to these,
remember that you may often use Ctrl+Tab and F6 to navigate to different groups
of widgets.
<h2>Browser</h2>
<p><i>fiv</i> normally starts in a file browser view. On the left side of the
window, you'll find your GTK+ bookmarks, mounted locations as recognized by
GVfs, an item for entering arbitrary filesystem paths or URIs, view controls,
and finally breadcrumbs leading to the currently opened directory, as well as
its descendants.
<p>You can open items in a new window either by middle clicking on them either
directly, or with the Ctrl key pressed down. Right clicking the directory view
offers a context menu for opening files, or even the directory itself,
in a different application.
<h2>Viewer</h2>
<p>The image viewer may be both entered (so long as you have a file selected)
and exited using the Enter key. This way you may easily switch between the two
modes. When using the mouse, the forwards and backwards buttons will fulfill
the same function.
<p>Double clicking the image switches full-screen view, and the mouse wheel
adjusts the zoom level.
<p>Files are iterated in the same order, and using the same filtering as in
the browser.
<h2>File formats</h2>
<p>The list of all supported file formats may be obtained by running:
<pre>
fiv --list-supported-media-types
</pre>
<p>Unless it has been turned off in your installation, you may extend it through
gdk-pixbuf modules.
<h2>Thumbnails</h2>
<p><i>fiv</i> uses a custom way of storing thumbnails, and doesn't currently
provide any means of invalidating this cache. Should you find out that your
<i>~/.cache/thumbnails</i> directory is taking up too much space, run:
<pre>
rm -rf ~/.cache/thumbnails/wide-*
</pre>
<h2>Configuration</h2>
<p>The standard means to adjust the looks of the program is through GTK+ 3 CSS.
As an example, to tightly pack browser items, put the following in your
<i>~/.config/gtk-3.0/gtk.css</i>:
<pre>
fiv-browser { -FivBrowser-spacing: 0; padding: 0; border: 0; margin: 0; }
</pre>
<p>Similarly, you can adjust some of the key bindings, as per the command table
in the <i>fiv-view.h</i> source file:
<pre>
@binding-set ViewBindings { bind 'p' { 'command' (print) }; }
fiv-view { -gtk-key-bindings: ViewBindings; }
</pre>
<p>Should you want to experiment, you will find the GTK+ inspector very helpful.
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