You have two options to do this:
1.) You click on a living member of the family tree and then select "Share" on the bottom of the screen. You can then choose the permissions you want to grant to your family members (either to only view the family tree or to add edits as well). After that, you either use familyecho.com's E-Mail template to send an invite link, or select "Create Link". This of course creates a link you can send to anyone you like and that gives everyone with that link the permission to either view the family tree or edit it (though only users who are signed in to familyecho can use all of the "Edit" features).
If you create the link while selecting the person "Mattheusz" on your family tree, every person who clicks on the link will see a view of the tree that is focused on Mattheusz (and, if you selected the permission "Edit") be able to edit Mattheusz without logging in. As you said you want to share your tree with family members, I just assume it's your family tree, it could be thus a good idea to send each family member an own link centered on them, so that they can edit any information about themselves if they like.
2) If you are finally "done" with your family tree (aka: don't expect to make any changes soon) you can click on "Save" instead of "Share" and select a data format. This option allows your family members to have a "copy" of the family tree for themselves (as they can't save the tree if you have just send them a "Share" link), and if they use other geneaology programs, they can upload it there. However, if you change your family tree after saving it on your computer, your family members will only see the old version.
You can of course combine both versions and send your family members a saved HTML of your family tree as a "backup" and share links as well, or upload the HTML on a filehosting server (or just Google Drive) and update it if you change the tree.
Hope this helped!
