ICONS control top right

These all accomplish the same goal...

html("
<style>
    .hud-menu-button.i-32-24.i-light-grey.i-setting-print{display:none;}
    .hud-menu-button.i-32-24.i-light-grey.i-setting-trash{display:none;}
    .hud-menu-button.i-32-24.i-light-grey.i-setting-copy{display:none;}
    .hud-menu-button.i-32-24.i-light-grey.i-setting-add{display:none;}
</style>
")

html("
<style>
    .hud-menu-button[title=""Print""]{display:none;}
    .hud-menu-button[title=""Delete record""]{display:none;}
    .hud-menu-button[title=""Duplicate record""]{display:none;}
    .hud-menu-button[title=""New record""]{display:none;}
</style>
")

html("
<style>
    .hud-menu-right .hud-menu-group:first-of-type{display:none;}
</style>
")

html("
<style>
    .hud-menu-right > div:first-child{display:none;}
</style>
")

Another way is to use the Ninox JavaScript objects. The ui.recordNavigation object gives you all the information about the record navigation buttons :

 Use NativeJS to hide or show one button : 

var hidden := false;
#{
    ui.recordNavigation.$add.setHidden(hidden)
}#

Or all buttons  : 

var hidden := false;
#{
    ui.recordNavigation.$actions.setHidden(hidden)
}#

You can also use html function :

var hidden := true;
html(---
<script>ui.recordNavigation.$actions.setHidden({ hidden })</script>
---)

In any case, the object is displayed whenever the hidden variable is modified. You could use it to adjust your interface according to certain parameters.
For example, you can display buttons only if the administrator mode is activated. 

html(---
<script>ui.recordNavigation.$actions.setHidden({ not isAdminMode() })</script>
---)

The ui.recordNavigation object also gives you access to interface functions to simulate user actions:

This example adds a new record, just as if the user clicked the "+" button :

#{
    ui.recordNavigation.add()
}#