Question Placeholder for Variables?

[wowi]

hi,

Tools & Settings --> Custom Buttons -->Add Link to Service -->Add parameters to URL-->Include subscription ID, domain ID and domain alias ID&dom_id=<dom_id>&site_id=<site_id>&alias_id=<alias_id>

is it posible to add only the parameter &site_id=<site_id> and not all parameters ?

if i select nothing and put manually the parameter to the URL Example Domain<site_id>
has no effect ;-(

are there no global Placeholder for parameters ?

thanks
wowi