How can I see all my relatives in my tree?

It depends how many people are in your tree. If your tree is large, then they have to truncate the branches for display purposes.

Usually there is a green arrow on the upper right which indicates further branches. Click on the green arrow and you will expand those branches.

Otherwise, you can make the boxes smaller, but the detail is lost.

Finally, if you are navigating using the tree, that is rather slower and it is better walking up and down branches via the profiles.

I want to print all my tree, with all relatives. Is it possible?

I have never printed everything because if would take too much paper and that would raise the temperature of the Earth somewhat. For my usage, I prefer the web interface

Please let me know your own experience in the print output.

Also, I find that the response from the Itsourtree's help line is a little better than the response of this forum.

I bought a big whatman size A0. Then picked out several trees, like my great-grandfather*4, great-grandmother*4, my grandfathers*2, and grandmothers*2, then uncles, aunts, .... - all hidden trees in short, and them printed them, cut and sticked on this whatman ))