How to know weather parameter is a "static or dynamic parameter"

Goto the T-code RZ11 in SAP system.

Below screen will be open "Maintain Planning Parameters".

Enter the parameter name and click on display.
Ex: rdisp/gui_auto_logout: This parameter used to logout the user after a specific duration. If the user is inactive.

How to change profile parameter in SAP (RZ10) and (RZ11)

Step-by-step procedure: (Profile Parameter Change – RZ10)

• Login to the SAP system
• Hit the transaction code ‘RZ10′
• Click Utilities and click import profiles
• Click back (F3)
• Place the cursor at profile and click f4
• Double click on Default profile
• Select the Extended maintenance and click change
• Click Parameter (Create F5)
• Place the cursor at parameter name and click F4
• Click a small triangle shape which is available on top of the box
• Type *login* and hit enter
• Double click on ‘login/no_automatic_user_sapstar’ parameter or search for parameter which you want to change
• Type the NEW parameter value
• Click ‘Copy’ Tab and click back (F3)
• Click ‘Copy’ Tab again to transfer The changed profile
• Click Back (F3)
• Click Save, Click back and Click Yes to activate the profile
• Log out from the SAP system
• Stop the SAP System (Server)
• Start the SAP System (Server)

I think I have covered all the steps related to changing a profile parameter; you can validate changes in parameter value through T-Code RZ11 after system restart.