Recent Files to access Recent Files mode.The Recent Files mode of the File Access tab provides quick access to files that you have opened in the past. In this mode, there are three sections of the File Access tab: Pinned, Categories, and Recents.
Recents is generated automatically. Pinned and Categories are populated with files that you add. Each of the three section and the groups within those sections can be collapsed or expanded so the list is easier to navigate.
Click any PDF shown to open it in Revu in the foreground. CTRL-click a PDF to open it in the background.
On the File Access toolbar, click Recent Files to access Recent Files mode.
Pinned Section
The Pinned section contains files that you have marked so they will not drop out of the Recents list. This allows you to keep a list of files that you use frequently. Files can be pinned from the Recents list or from the Explorer.
To pin a file
Explorer mode, hover over the file you want to pin.Click the 
Pin icon to the right of the file's name. A menu appears.
Pin File.Pinning a file adds it and its folder to the Pinned section. The Pinned section will be appear if it was not visible.
Sorting the Pinned list
To sort the Pinned list, click the icon on the right side of the Pinned section divider and select the desired sort option: 
By Date, 
By Folder, or 
Alphabetically.
The sort icon changes to show its current setting.
By Date: Files are arranged in a single list with the most recently opened files at the top.
By Folder: Files are arranged by the folder in which they reside, with the folder name displayed above the file name. The folders are sorted alphabetically using the drive letter and the folder name. For example, C:\Zero will be sorted above D:\Alpha. Click the triangle to the left of the folder name to collapse or expand that section. Click the folder name to open that folder.
Alphabetically: Files are arrange in a single list, alphabetically by file name.
Categories Section
The Categories section allows you to pin files into groups that you define. This allows you to group files together that are not in the same folder or drive and to organize your pinned files so that they are easier to access. The Categories and the files in each category are sorted alphabetically by name.
To add a file to the Categories list:
Explorer mode, hover over the file you want to categorize.Click the Pin icon to the right of the file's name. A menu appears.
Click the category name to expand or collapse that category. Right-click on the category name to Expand/Collapse, Rename or Remove the category.
Right-click on the Category section divider to Collapse All, Expand All, or Clear All Categories.
Recents Section
Recents is an automatically generated list of files that have recently been opened. The Recents list has a maximum number of files it will remember. Further, a predefined amount of time that files will remain in the Recents list can be set. Both of these settings are found in File Access Preferences. Individual files can be manually removed from the Recents list or the entire Recents list can be cleared manually.
The Recents list shows the file name. Hover over the file name to show the full file path and a preview image of the file. The preview image can be disabled under File Access Preferences, if desired. Click a file to open it or right-click on a file name to open the file, open the folder the file is in, or remove the file from the Recents list.
Sorting the Recents list
To sort the Recents list, click the icon on the right side of the Recents section divider and select the desired sort option: By Date, By Folder, 
Most Accessed or 
Access History.
The sort icon changes to show the currently selected sort option.
By Date: Files are arranged in a single list with the most recently opened files at the top.
By Folder: Files are arranged by the folder in which they reside, with the folder name displayed above the file name. The folders are sorted alphabetically using the drive letter and the folder name. For example, C:\Zero will be sorted above D:\Alpha. Click the triangle to the left of the folder name to collapse or expand that section. Click the folder name to open that folder.
Most Accessed: Files are arranged by the number of times each file has been opened with the most commonly opened file at the top.
Access History: Files are arranged by when they were last opened, grouped in sections like Today, Yesterday, One Week Ago, and so no, similar to the History in a web browser. Click a section name to expand or collapse that section.
To remove a file from the Recents list, right-click on the file and select 
Remove.
To clear the Recents list, right-click on the Recents section divider and select Clear All Recents.
File Access Tab - Explorer Mode