i'm working over some artwork but the document size showing in the photoshop in the system i'm using is more than 1 GB. Although, the size of the PSD file is 33.6 mb. Due to this, photoshop is hanging and i'm not able to work properly over the artwork. i'm attaching the document size underneath.
i just want to know that why the photoshop is showing 1.17 GB?
Moreover, how can this problem be resolved?