To open a dialog for preferences of PCManFM-Qt :menuselection:`Edit --> Preferences`. The :guilabel:`Behavior` tab has settings for how PCManFM-Qt manages files. The checkbox :guilabel:`Open files with single click` opens files by clicking on them once and you select files by mousing over them. To make the auto selection slightly delayed and to adjust this change :guilabel:`Delay of auto-selection in single click mode` field. To show a folder context menu when you :kbd:`Control+ right click` check the :guilabel:`Show folder context menu with Ctrl+ right click` checkbox. The :guilabel:`Bookmarks menu` drop down menu has options to either Open bookmarks in the current tab, Open bookmarks in a new tab, or Open bookmarks in a new window. To change what view mode PCManFM-Qt starts with change the :guilabel:`Default view mode` drop down menu. The :guilabel:`Confirm before deleting files` checkbox makes a confirmation dialog before deleting files. The checkbox :guilabel:`Move deleted files to "trash bin" instead of erasing from disk` puts files in the trash bin instead of always deleting them. The :guilabel:`Erase files on removable media instead of "trash can" creation` erases files on removable media instead of creating a trash can on the removable media. The checkbox :guilabel:`Confirm before moving files into "trash can"` brings a confirmation dialog before moving files to the trash can. The checkbox :guilabel:`Launch executable files without prompt` will run executable files without bringing up a prompt asking what to do with the file however you will need to restart PCManFM-Qt for this to take effect. To select new files automatically check the :guilabel:`Select newly created files` checkbox. To have PCManFM-Qt only open one window check the :guilabel:`Single window mode` checkbox. To change the number of recent files saved change :guilabel:`Number of recent files` field.
..image:: pcmanfm-qt-prefrences.png
..image:: pcmanfm-qt-preferences.png
The :guilabel:`Display` tab allows you to change icon sizes, displaying file sizes, hiding backup files, and settings for margins. The :guilabel:`Size of big icons` drop down menu changes the size of big icons in PCManFM-Qt. The :guilabel:`Size of small icons` drop down menu changes the size of small icons for PCManFM-Qt. The :guilabel:`Size of thumbnails` drop down changes the size of thumbnails in PCManFM-Qt. The :guilabel:`Size of side pane icons` drop down changes the size of side pane icons. The checkbox :guilabel:`Use SI decimal prefixes instead of IEC binary prefixes` treats kilobytes, megabytes, and gigabytes as base 1000 instead of 1024. To toggle showing backup files as hidden check/uncheck the :guilabel:`Treat backup files as hidden` checkbox. To always show the entire file name check the :guilabel:`Always show real file names` checkbox. To show the icons of hidden files as shadowed to distinguish they are hidden files check the :guilabel:`Show icons of hidden files shadowed` checkbox. To disable tooltips check the :guilabel:`Do not show file tooltips` checkbox. To disable smooth scrolling in list and compact modes check the :guilabel:`Disable smooth scrolling in list and compact modes` checkbox. To change the minimum margins in icon view for number of pixels change the numbers in :guilabel:`Minimum item margins in icon view`. To toggle making the margin a square check the :guilabel:`Lock` checkbox.
