In Properties Dialog you can view and change properties of remote files and directories. To display the dialog go to Files > Change Attributes.
The dialog has two tabs. Each is described individually.
In the upper part of the dialog you can see information about the selected file(s). The counter will initially not include files and directories in subdirectories. Press Calculate button to count even these.
The Size field will state "Unknown", if the selection contains at least one directory. Press Calculate button next to it to calculate the total size of all files in the selected directories (symlinks are not followed).
When properties are shown for single symbolic link (symlink), link target will be shown in additional Links to field. If you need to know link target frequently, you may want to display optional Link target column in file panel.
The Group and Owner boxes can be used to change ownership of the selected files. Initially the boxes will show current ownership as long as all selected files has the same owner/group. Otherwise the boxes will be empty. Leave them empty not to change the ownership, when you are changing other properties (like permissions).
The boxes are disabled if current protocol does not allow changing ownership.
Some protocols may allow changing ownership by specifying UID/GID numbers only. In that case you will see both username/groupname and UID/GID in the boxes in form name [number]. If you want to change ownership specify new number only. (see note 1)
The permissions box can be used to change permissions of selected files.
The box is disabled if current protocol does not allow changing permissions.
You can also set permissions for newly uploaded files directly in transfer settings.
Changing Properties Recursively
If the selection contains at least one directory, there will be additional checkbox Set group, ownership and permissions recursively. It will make WinSCP change the properties for all files in selected directories.
With SFTP protocol this can take considerable time as the change must be made for each file specially. With SCP protocol the change is made once for each selected file or directory only, so it can be much quicker. However as consequence WinSCP will not be able to keep some properties, especially permissions, of files in subdirectories unchanged, when you request it.
The Checksum tab lets you calculate checksum/hash of selected file(s). The feature is available with SFTP protocol only, subject to support of respective SFTP extension.
Use Algorithm selection to choose checksum/hash algorithm. The dropdown list contains standard algorithms, however you can type in name of any other algorithm supported by the server. Use button Calculate checksum to request the calculation.
You can copy the calculated checksum(s) to clipboard using Copy command of the display context menu.
1) The text is copy of PuTTY User Manual or was inspired by it.