I have 6 lists with items for each continent (region). For instance,
- first list is for Europe - Austria, Sweden, Germany etc.,
- second list is for Asia - India etc.
- third is Africa
- etc. (six regions)
User have to select all countries he is interested in. User should be able to select "all countries" and "all for specific region" (for instance, all Europe). This appears on registration form, thus there is no much space for this.
I am web developer and cannot figure out how to better show this. I have decided that this probably should be shown in modal window, because it is takes too much space to be shown on registration form directly.
And I have tried the simples way - three columns with checkboxes x 2 rows (each column per each region), however, this doesn't look good, because 1) each continent has different number of countries 2) it still takes too much space to display all countries
What if I have multi-select with checkboxes? Would it work? Africa has about 50 countries in it, Europe also, other regions have less countries.