The Livesearch macro allows you to add a search box to a Confluence page. When users enter a search term into the search box, Confluence will dynamically display matching results as they type.
From the editor toolbar, choose Insert 
> Other Macros
This is the Children Display macro
Parameters
Restrict to this Space Key: Specify a space key to limit the search to the given space. Case-sensitive.
ex: Enter the space key "ISAPPSUP" to limit the search to the space My Business Apps
ex: limit the search to pages with the label "bw"
Size
Choose a medium or large search field size. By default the size is medium.
ex: Size = Medium
ex: Size = Large
Placeholder text
Specify the placeholder text to appear in the search field, for example 'Search this space'
ex: Size = Medium
Result
Type
Specify the content types to be included in the search - choose from pages, blogs, comments, space descriptions, or all content types.
Additional
Display the space name, a page excerpt or nothing under the search result.
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