This is the Summary tab of the Visit Editor. The screen shot below is taken from an active practice and hence some data has been intentionally blurred.
[Careful observers will also note that this is a screen shot from a system using a modified label for the Find button.]

The buttons are as follows:

OK - save any changes and close the Visit Editor.
Cancel - cancel any changes and close the Visit Editor.
New - add a new item to the medical record - a window will open allowing you to select the type.
Edit - edit the selected item
Delete - delete the selected record - a confirmation window will be displayed.
Print - print what is shown on on the screen.
Mail - email what is shown on the screen.
External Edit - this button appears if the selected record is a document that can be edited in OpenOffice. Clicking this will launch the OpenOffice editor to edit the document directly, avoiding the need to download, edit and re-upload the document.

This screen is very similar to the Patients|Medical Records Summary tab - see this for further information.