The link atthias gave shows how to use "spoilers". There is also the "contentbox" tag: the black button with white down arrow, near the spoiler button (in the advanced editor).
Wrapping your pics in contentbox tags like this...
[CONTENTBOX=early third age imladris archerguards]
[IMG]http://s7.postimg.org/5f4hpm7uz/medieval2_2016_02_19_04_17_45_79.jpg[/IMG]
[IMG]http://s11.postimg.org/gm6mbr443/medieval2_2016_02_19_04_17_47_82.jpg[/IMG]
[IMG]http://s27.postimg.org/k2j8jfkjn/medieval2_2016_02_19_04_17_53_32.jpg[/IMG]
[IMG]http://s7.postimg.org/w99n87tcb/medieval2_2016_02_19_04_17_56_87.jpg[/IMG]
[/CONTENTBOX]
[CONTENTBOX=early third age imladris swordsguard]
[IMG]http://s24.postimg.org/fg2kp3ir9/medieval2_2016_02_19_04_13_04_70.jpg[/IMG]
[IMG]http://s14.postimg.org/jaovjny41/medieval2_2016_02_19_04_13_07_55.jpg[/IMG]
[IMG]http://s14.postimg.org/h3kmvqstt/medieval2_2016_02_19_04_13_15_42.jpg[/IMG]
[IMG]http://s18.postimg.org/k0wbzlwft/medieval2_2016_02_19_04_13_27_22.jpg[/IMG]
[/CONTENTBOX]
...gives you this...
early third age imladris archerguards |
|
early third age imladris swordsguard |
|
...which makes navigating your thread a lot easier.