How to create a semi-transparent map collar in QGIS composer?

How do I make a map transparent in QGIS?

Right click somewhere on the white empty page, click “Page Properties”. In the right sidebar the “Item Properties” tab will be activated, modify the background colour opacity to 0. For each map item then select it, and in the right sidebar simply untick “Background”.
 

How do I create a map composition in QGIS?

With QGIS you can compose maps that can be printed or exported to image and graphics files. To get started, click Project | New Print Composer. Give the new composition a name, click OK, and the Composer window will open. The composer presents you with a blank sheet of paper upon which you can craft your map.
 

How do I make a map portrait in QGIS?

Click the Item Properties panel on the left down side and find the setting for the orientation. Change the value of the setting Map orientation to ‘15.00° ‘. You should see the orientation of the map item change.