【Page width】：Software page width, usually associated with machine X breadth。
【Page height】：Software page height，usually associated with machine Y breadth。
Under normal circumstances, if you have connected to the motherboard, software will
automatically format for the current work of the machine, as a page size.
If the board is not connected, or need their own custom page size (such as to set the
page size by material), you can use the page setting to reconfigure the page size.
2.4 File Open and Save
The software uses rld file format to save graphic information 、 layer parameters of
various layers and processing sequence of the graphic elements.
2.4.1 Open File
（1） Click menu【File】->【Open】,or click icon , the following dialog box appears：
Select file
（2） Select file (e.g. Default.rld), click【Open】。
2.4.2 Save File
（1）Click menu【File】->【Save】,or click icon ,the following dialog box appears：
