OnlyOffice uses the Save dialog when it is running in Windows 10. It has some unique features that are not available in other operating systems.
Left column (sidebar)

The left sidebar contains quick access folders and any external drives and virtual drives connected to your computer.
Simply click one and the section in the middle will show the folders and documents inside the folder you just selected.
Directory path
The directory path in the bar at the top of the dialog, the active folder is the one farthest to the right. Folders to the left of it contain the active folder. The bar shows the hierarchical structure that the directory is part of.
This hierarchy allows you to easily move higher in the structure simply by clicking on one of the folders to the left of the active one. Clicking one of the folders to the left will show its folders and documents in the middle section.

An arrow next to the active folder can be clicked, and the folders that are contained in it will be shown in a list. The other folders in the list also have arrows that reveal lists when clicked.
Middle section
The middle section, which is to the right of the left column, shows folders and documents in the active folder.

- Double-click a folder to enter them and make it the active folder.
- Clicking documents changes the text in the File name text box to the name of the selected document. This feature allows you to replace the selected document with the newly created document. It also helps name the new document, if you want you want a name that is similar to the selected document.
Click the desired document in the middle section. Then modify the name in the File name text box.
Organizing the middle
The folders and documents in the middle can be reorganized by using the four filters at the top of the middle section: Name, Date modified, Type, and Size.
Click one, and the folders and documents will be reorganized. For example, click name and they will be organized alphabetically. Click it again, and the order will be reversed.

There is an arrow associated with each filter. Click one and menu launches.
There are several tools in the dialog that affect the middle section.
Change your view
This icon at the right side of the dialog contains a menu of different views. Selecting one changes how the folders and documents in the middle section look.
Click the icon to cycle through the eight choices. The drop-down arrow associated with the icon reveals the choices.

- Extra large icons
- Large icons
- Medium icons
- Small icons
- List
- Details
- Tiles
- Content
Click the arrow. Then click the desired choice, or use the slider to select one.
New folder
Sometimes you want to create a new folder for the document you are about to save.
Clicking the New Folder item that is located just above the middle section and left column will create a folder in the active directory. It has a text box with New folder highlighted in blue.
Type over the text with desired name with the folder. Press return or enter on your keyboard when you are done.
Double-click the new folder to enter it and make it the active folder.
Search field

For active folders that have a lot of folders and documents in them, narrowing the results by using keywords can be helpful. The search field is in the top right of the dialog.
Type a desired string of characters in it. Then click the associated arrow or press return or enter on your keyboard. The active folder will be searched, and the results in the middle section will reflect the characters entered in the field.
File name
This text box will have untitled text in the text box. Type over this text with the desired name.

Save as type
This is a drop-down menu that allows you to change the file format the document will be saved in. By default Microsoft Office formats are active, but OpenDocument and PDF are among the choices.
Simply click the drop-down menu. Then click the desired format.
