when you have huge landscape it is really pain to get from one point to another, please make some option we can change speed (not just increse speed because we will have problems with small details)
Roll the mousewheel while moving. You can speed waaaaaaay up or waaaaaay down on the fly.
This may be useful for you:
Check out ‘bookmarks’ option on that doc, you can place bookmarks around your level that you can jump directly to rather than having to scroll for miles.
i already use mouse wheel but my landscape is big 
yea i red somwhere about marks but here it is described very good tnx this will help but i guess they will make some adjusments in future for this.