Check out example codes for "how to make a workspace container bigger in css". It will help you in understanding the concepts better.

Code Example 1

#workspace_container {
        height: 1000px;
		width: 83%;
		min-width: 1060px;
    }

    #workspace {
        padding: 10px;
        /*height: 590px; */ /* (height of activity_area) - (2*padding) - (height of controls) */
        height: 1000px;
    }

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