  type="button" class="collapse-button ">Tools</button>
                                        <ul class="collapsible-content ">
                                            
                                                <li class="fourth-level "><a href="../guide/bones/tools/select.html">Select bones</a></li>
                                            
                                                <li class="fourth-level "><a href="../guide/bones/tools/show-hide.html">Show/Hide bones</a></li>
        