Altium Designer新版一个关于栅格（Grid）的设置方法

Nesting and Grid Priority
Grids you define in the Grid Manager dialog can be freely stacked within the board area. By specifying origin coordinates accordingly, you can overlap grids, creating a nested hierarchy of grids, with which to fine tune placement of design objects as you layout your board.
Grid contention – which grid in an overlapping stackup of grids should a design object snap to – is resolved using a priority system. Each local placement grid you create and define is given a numbered priority. By default, each new grid is given the highest priority of 1, with all existing grids moved down in priority accordingly.
The Global Board Snap Grid is an exception. As it is the default grid that is used in all areas of the board that are not 'covered' by defined custom grids, it is given the priority setting of Default. It has the lowest 'snapping priority' of all defined grids.
In the workspace, priority is distinguished by drawing order. The highest priority grid (priority 1) will be drawn in front of all other grids, then the grid with priority level 2, and so on, down to the default Global Board Snap Grid, which is drawn behind all other custom grids.

从这个视频中可以看出，AltiumDesigner的最新版是可以多个栅格型式并存的——极坐标和直角坐标在同一个界面并存，多个栅格尺寸在同一个界面并存。

咦，这个动画搞的不错啊，怎么做到的呢！