Default [Q] Secondary Partition help needed

hello seniors, i am seeking help regarding making use of secondary memory partition... followed by a tutorial, i made 4-4 GB 2 partitions of my 8GB memory card in order to create extra internal memory, which was 1.77GB by default...
I have rooted my phone and also have installed Link2SD app... But the problem arises is that the app directly link any app installed to my SD card which is now cut down to 4GB instead of 8GB... but the secondary partition is almost empty and unused...
In app settings, if i choose link files to internal memory then my 1.77GB memory is consumed instead of the secondary partition...
so my question is how come i make use of that extra partition that i created??
in phone settings also there are options of writing new apps in either phone memory or external card... how can i access the secondary partition