Question: Maple10 Manual, pg. 248

Hello, I am trying to follow the example in the MAPLE10 User Manual, pg. 248. I have created the file GeorgeWorkbook6.mw, which I just uploaded. As far as I can tell, my file is identical to what is shown on pg. 248. The Manual says 4. Select the entire area (text and math content) to format. 5. From the Format menu, select Create Document Block. I select the entire area, then I go to the Format menu, and I find that the option 'Create Document Block' is greyed out - that is, it is unavailable. In fact, that option only seems to be available when nothing is selected. Could it be that there is an error in the Manual here? Any suggestions
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