Keyboard help

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macOS & Mac Apps

I am looking for a keyboard shortcut when using Safari. I am using a Mac and the latest version of Yosemite. The problem I am having is that I need to use a web site frequently and in order to select OK, I need to adjust the size of the window I am using or the font size. When using this web site, a secondary window opens up that I need to check mark certain boxes. In this secondary window, the OK or Cancel buttons are at the very bottom and this window is not scrollable. So I need to increase the size of the main window to have the OK and Cancel buttons seen in the smaller secondary window. I was hoping to find a keyboard command to makes this easier. I have had no luck finding such command. Thanks for you help.

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