symbolism on tree

[deep70]

Hello everyone,
I would have a question to ask you, I always press that I am not very expert on inventor, the question is as follows:
I just finished putting the table of a particular, once reopened I noticed a lot of red "saetta" next to the voice "sheet:1" place an image for greater clarity.
I would like to understand precisely what this symbol refers to.
thanks to all for any answers.

 

[MassiVonWeizen]

http://help.autodesk.com/view/invntor/2014/ita/?guid=guid-6ab26be3-0641-4195-83db-051193a0c83a

 

[deep70]

http://help.autodesk.com/view/invntor/2014/ita/?guid=guid-6ab26be3-0641-4195-83db-051193a0c83a

question scema... How do I update this view? ?
thanks anyway massivonweizen..

 

[Il Mauri]

go to management and clicks update all sheets. sometimes, however, the "saetta" remains until you close the design and then echo it.

 

[deep70]

go to management and clicks update all sheets. sometimes, however, the "saetta" remains until you close the design and then echo it.

thank you mauri, I found it in fact, forgive my poor mastery with inventor, I am at first.. I must say that it is not bad as a modeler, sometimes not very direct compared to others, as in this case for example, but in general it is good to say.