Unable to place trees nor rocks

[Demagogue]

Dear community,

I am sorry to disrupt your on-going work with my silly question however, I see not alterantive. As the title says I am unable to neither place rocks nor trees in certain part of my newly started map. Actually first ever be. The yellow geometrical form top left shown on the picture is the area where I am actually not allowed to place such doodas.

 

[cookies4you]

try holding shift then left clicking to spawn the item

 

[Warhunter]

I think it got something to do with the view option.. Look at the menu below 'View' for something that may make the trees to show up.

 

[Demagogue]

Thank you for all your replies. It works while holding shift.

If you allow me I would like to know how do you add different light sources in a map and make it look more dynamic? I seen some maps that seem to have many, many light sources what makes the map looking stunning! I still can't figure how to do this! Anyone has came upon any tutorial that would be of help?

Also, my water just disappeared. The little blue squares can be seen i the minimap, but as to the mainfield there is not even a single drop! I just see square's outlines and the square's empty content.