No this can be done in any page. Doubleclick on an empty place in your page. At the right in your screen the page properties will show. At the bottom you will find the field Custom. Click on it once and the Main page settings will open. The tab Info is what you're looking for.
Hi, i try to tell my question some better... Sorry for my english...
When i make a site with a master page, i compile all the field in the "tab info" (tilte, keywords and meta tag).
Is good thing compile also the "tab info" of every page of the project, or is it redundant if i have compiled all field of the "tab info" of master page?
Do what Petran said. Double click on an empty space on a client page/not the master page and select custom from the right side panel at the bottom-select info at the top of the pop up window-fill in what you want for that page. upload it and view the source.do it for different pages with different info and see what happens
or are you asking if you can enter the meta tags once in the master page and have all other pages inherit the info.
Testa, you can act in two ways: 1- put the info in every page of the site (if they change) 2- put the common info in the master-page and this info will be generated in every page that use this master-page because of page inheritance. Check the help for this topic.