sections : head, how it works

[philsogood]

hi
i have noticed that sometimes that when you move the head (or section extends i don't remember) the other part is moving too
but i doesn't work everytimes and i didn't understand why it works sometimes
have you any idea?
Phil

[pedruccioli]

The dashed blue line with control arrows is the crop box of the view, it is only visible when that option is active. The heads and black line (dark blue at the screenshot) is an annotation, and you can control it as a 2D element, no matter the view size/depth, but once you touch it, it will stay still, no matter the changes made to the crop box.

[barthbradley]

FWIW: 

In the Section View Properties, you'll see Extents. The Far Clip Offset - and Crop Boundary - also control the extents of that bounding box you are seeing in the Plan View.  

[philsogood]

hi @barthbradley 

i don't understand what you showed me

"playing" with extends option doesn't change anything to this issue

i can check/uncheck crop view, crop region visible it has no effect

as i said above i'd like to know why sometimes when you move the head, the crop voiew move too and sometimes it doesn't work

Phil

[RobDraw]

I too struggle with remembering this. Once I think I figured it out, the next time I try it doesn't work but I believe the way that it is supposed to is if you change the extents of the view the mark follows. Once you change the mark, it doesn't go back to that behavior.

[ToanDN]

Consider the head and tail of a section are like the 2d extent of a level and the actual section is like the 3d extent of the level.  Once you stretch the head and tail off the original, they no longer connect to the actual extent of the section. 

Recently, autodesk introduced the option to reset 2d extent if levels and grids so hopefully it will come to sections in the future.

[barthbradley]

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@philsogood wrote:

as i said above i'd like to know why sometimes when you move the head, the crop voiew move too and sometimes it doesn't work

Phil

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Sounds like you are simply grabbing the wrong part of the Section Marker.

[barthbradley]

Do you have a Scope Box associated with those Section Markers?  If so, that would change the behavior. If not, I don't know what behavior you are describing.   It seems others do though.   Maybe my Revit is broken.  he, he.  

[ArqRobertoDraft]

Hi, I hope this works.

The extension region of the section only moves when you are changing the position of the section line, however, it doesn't move when you change the size of the section line.

The size of the section line works independently of the view region, you don't have any option of changing it at the same time. (If you move the head or the tail of the section it will never change the size of the view region)

We may think about the section line as a generic 2D annotation.