The Blocks tab page is used to edit parameters for individual [yard blocks](YardBlock.html) This page provides a central location for viewing all the blocks in your model so they can easily be edited in tandem. Tab Page Details  Blocks List- This list shows each of the yard blocks that have been added to the model. To edit a block, highlight it in the list. The up and down arrows can be used to reorder the list, but do not change the location of the blocks. Block Parameters - For definitions of the parameters on this tab page see the individual [yard block page](YardBlock.html). The figure below shows how FlexTerm numbers the 20ft and 40ft bays with an example block of 44 TEU long and 8 cell wide. Odd numbers mean 20ft bays and even numbers mean 40ft bays. Note that how the 40ft bays are numbered. Each 40ft bay consists of two 20ft bays. For example, 40ft Bay 2 consists of Bay 1 and Bay 3; 40ft Bay 4 consists of Bay3 and Bay5. FlexTerm does not allow mixing of 20ft and 40ft bays. That means, once one bay is claimed as 20ft bay, all the cells in that bay cannot be part of a 40ft bay, or vice versa. For example, FlexTerm does not allow containers in both Bay 3 and Bay 4, as this will cause mixing of 20ft and 40ft bays.  Blocks Diagram View  The blocks diagram view shows each of the yard blocks in your model. When you click on a block in the blocks list, that block is highlighted in red in the view. This view operates like a typical [orthographic view](Flexsim_Users_Manual.html) in that you can zoom and translate the view by using the mouse buttons. Additional information is shown in this view to help users identify blocks and their locations. Each block has its name shown in the middle of the block. The blue cross indicates the orgin, i.e. (0, 0 ,0) of the model's coordinate system. There is a small diamond drawn at the each corner of the block. This diamond indicates the origin, i.e. (0, 0, 0) of the block's local coordinate system. This information is useful when you use the [RMG sequence](rtg.html#rmgsequence) command to instruct a crane to move to a certain location relative to the block's coordinate system. This view helps you identify each block so you can properly name it and set other parameters.