What I am trying to do is to to have two items coming from one source disposed and transferred in parallel. Also if it is possible to have them change their movement axis on a second convoyer later without changing their position (the model is for drywall transfer system)
What do you mean by having them transferred in parallel? Do you have 2 different conveyors that you are wanting to send 2 items to at the same time? Or do you want the items stacked on each other?
For your second question, are you wanting to do something like this where the box is still in the same position but is now traveling in a different direction (in this example travelling to the right and then traveling up)?
For the first question I meant to have two items coming on the convoyer side by side rather than stacked or one behind the other. For the second question, yes it's what I meant exactly, adding the fact that their will be both of the items that are side by side (not just one) traveling in a different direction in the same position. (check the attached visualization) 
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A possible solution is to combine them together. A second entering item is move as a subnode into the leading item. You will have to remove the second item instantly from the conveyor system because it is not inside a conveyor anymore. It is more a like child of the first leading item. You can set a Location in relation to the first and you can move the first item to get an offset in y-direction. But you must be aware of the fact that the FlexSim engine only recognize the first item until you separate the second one again.
The combining is a result of the command or activity called moveobject. As I said you have to set a well looking location of the second item on your own.
Thank you for your answer, I will try to do that (although I am only a beginner). So, I believe that I need to use a decision point with an onarrival event where i could code that logic, is that right?
Hi @Mohammed_adnane T, here's an example of what Joerg was saying with combining them. I combine two flow items together in 0 time and use a trigger to set the location of the 2nd item. I then use a decision point to translate the item to the left to center it on the conveyor.
The example on top shows the combiner and the example on bottom shows what it looks like to hide the combiner (unchecking Show 3d Shape in visual window).
@Eric M @Joerg Vogel Thank for your answers, I finally opted for dividing the line into two synchronized conveyors using the same source (in process flow). It helped solving other complications in the rest of the simulation.
For my second question I changed the entry orientation of the conveyor (in the entry transfer) to "Item Y+" which suited perfectly my need.
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