Change Default Link Behavior
By default, external links are opened in a new browser window in HTML / HTML5 output. To change the default value for all external links the layout settings have to be updated. There are four available options:
_blank - Will open the link in a new browser window. Default setting
_self - Will open the link in the same browser window.
_parent - If the link is nested inside other frames, it will open the closest frame (one level up) in the browser window.
_top - If the link is nested inside other frames, it will open the initial webpage (the topmost / outermost frame) in the browser window.
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The following instruction describes how to change the default link behavior for external links to be opened in the same browser window.
Scroll down to Open external website links in new tab or window section.
Select _self from the menu.

Select Save.

