how can i install three os on the same partition

i am using acronis disk director suite and i cant find any option to install many os on the same partition

 

First of all, you need to install Acronis OS Selector if you have not already done so. It comes as part of Disk Director Suite 10.0, but is not automatically installed.

1.3.2 (Of the User Guide) Acronis OS Selector installation
To install Acronis OS Selector, you should first install Acronis Disk Director Suite. Then
select Start - Programs - Acronis - Acronis DiskDirector - Install Acronis OS
Selector and follow the setup program instructions.

Then, refer to Section 8.2.3 of the User Guide "Installing another Windows on the Same Partition".

AFAIK, you can only install multiple Windows OS on the same partition. I don't think you could put Linux on there as well for example.