About Restrictions and Functions in ECAD Areas
The following ECAD areas are available for reserving space:
• 
Place restriction region
Place restriction region◦ Keep-in—Restricts placed components inside this region. You can specify a height above, below, or on both sides of the board to create a volume. The default height is zero.
◦ Keep-out—Restricts component to outside this region. You can specify a height above, below, or on both sides of the board to create a volume. The default height is zero.
◦ Region—Groups components with the same function.
• 
Route restriction region.
Route restriction region.◦ Keep-in—Reserves space specifically for routing. No drilling is allowed in this region, for example.
◦ Keep-out—Reserves space where no routing is allowed.
• 
VIA restriction region.
VIA restriction region.◦ Keep-out—Reserves space where you cannot create VIA holes.
• 
Flexible restriction region—Provides a region that is not rigid. Informs an ECAD user working in 2D or 2.5D where the board is flexible and not rigid. This option is available only in an ECAD assembly.
Flexible restriction region—Provides a region that is not rigid. Informs an ECAD user working in 2D or 2.5D where the board is flexible and not rigid. This option is available only in an ECAD assembly.• 
User defined restriction region—Reserves space for a user defined area. The type and color o f the area is set by a *.csv file containing a list of company defined areas. This option is available only in an ECAD assembly.
User defined restriction region—Reserves space for a user defined area. The type and color o f the area is set by a *.csv file containing a list of company defined areas. This option is available only in an ECAD assembly.