As for spoiler tag, this forum doesn't have that. If you don't want your images to show up immediately, I guess the alternative is to post them on an external image hosting site and just link to them, but unless you really want a spoiler tag to actually prevent people from seeing the image by default (to not spoil your players or some such), I recommend you just post them as attachments as you have so far.
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I have to admit to being a little confused about which part of the map you are referring to. Is it the bottom right corner?
You might be interested in Shessar's cliff and stream tutorial. I shall go and find it and come back to you with a link
Ps: do you know how can I put a spoiler tag in the attachments?
As for spoiler tag, this forum doesn't have that. If you don't want your images to show up immediately, I guess the alternative is to post them on an external image hosting site and just link to them, but unless you really want a spoiler tag to actually prevent people from seeing the image by default (to not spoil your players or some such), I recommend you just post them as attachments as you have so far.