Drupal 7 missing edit button on user profile page

Question

I've fully customized theme for Drupal 7. And on the user profile page there is no edit button. "History" field is only thing which is displayed. I understand that I did something wrong with theming. What I need to do to have this button:

Answer 1

It should be mostly a permission issue as indicated by Boriana. If no tabs are visible at all in your custom theme then most likely you forgot to print the rendered tabs or task. In default Drupal theme, tabs are rendered using code print render($tabs); in page.tpl.php file;

If your theme is based on different theme, then you may have different variable name. For example, when I used adapative theme, I had following block which prints the tasks or tabs.

 <?php if ($primary_local_tasks || $secondary_local_tasks || $action_links): ?>
                <div id="tasks" class="clearfix" role="navigation">
                  <?php if ($primary_local_tasks): ?>
                    <ul class="tabs primary clearfix"><?php print render($primary_local_tasks); ?></ul>
                  <?php endif; ?>
                  <?php if ($secondary_local_tasks): ?>
                    <ul class="tabs secondary clearfix"><?php print render($secondary_local_tasks); ?></ul>
                  <?php endif; ?>
                  <?php if ($action_links = render($action_links)): ?>
                    <ul class="action-links clearfix"><?php print $action_links; ?></ul>
                  <?php endif; ?>
                </div>
              <?php endif; ?>