Throughout the help you'll find instruction steps like this:
•Filter... shows the session comparison private filters dialog
This is a shorthand notation for performing consecutive steps in the user interface.
The first example indicates that the action of clicking the Filter... will result in showing the dialog described.
The second example directs you to open the Settings menu (from the menu bar in this case), and then choose the Settings item, and in the dialog that appears, open the Data Collection option via the list and select the Trace Hooks child entry.
Where you see this mouse menu the instruction is to use the right mouse button menu (a.k.a. popup menu or context menu) and select the menu option that follows this symbol.
For example: useEdit Source Code...
Shown next to a picture, the hand symbol indicates the image is interactive and can be clicked on in order to jump directly to the help section most relevant to the part of the image under the cursor.
You may see this symbol after some links. Those links lead to an external website (shown in your default browser), as opposed to jumping to another section in the help. Naturally, if you have no internet access, these links will be unavailable.
For example: Software Verify Limited
Notes pertaining to the current topic are indicated by the symbol. Notes may include exceptions to a rule, items to watch out for, or other asides to the main topic.
Notes that act as warnings will use the similar symbol, for example where there's a danger of crashing your application. Don't panic though - there aren't many of these!
Where there are other pages in the help that have more detail on the topic at hand, or if there is additional reading that is not already linked within the content, you will find these sections linked after the symbol.