请务必保留辅助线的这个单独的图层，这样你可以很容易隐藏和显示它们。

Make sure to keep the help-lines in separate layers, so that you can easily hide and show them.

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在计算机辅助设计与绘图中，合理地设置和利用图层可以有效地提高绘图效率，本文较详细地介绍其做法和一些技巧，供同行参考。

Properly setting and utilizing layer in computer aiding design and plot will improves drawing efficiency apparently, This article introduces in detail some using skill to provide for readers.

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