apex:pageBlockButtons

apex:pageBlockButtons, this tag is used to define a set of buttons that are styled like standard Salesforce buttons. This tag must be a child component of on apex:pageBlock tag.

Example:

<apex:page standardController="Account">

    <apex:form >

        <apex:pageBlock title="Account Details">           

            <apex:pageBlockSection title="My Content Section" columns="2">

                <apex:inputField value="{!account.name}"/>

                <apex:inputField value="{!account.AccountNumber}"/>

                <apex:inputField value="{!account.type}"/>

                <apex:inputField value="{!account.accountNumber}"/>

            </apex:pageBlockSection>                       

            <apex:pageBlockButtons >

                <apex:commandButton action="{!save}" value="Save"/>

            </apex:pageBlockButtons>

        </apex:pageBlock>

    </apex:form>

</apex:page>

Result of the above visualforce page.

apex:pageBlockButtons

apex:pageBlockButtons attributes

dir, id, lang, location, onclick, ondblclick, onkeydown, onkeypress, onkeyup, onmousedown, onmousemove, onmouseout, onmouseover, onmouseup, rendered, style, styleClass, title.

To know more about apex:pageBlockButtons, refer this URL https://developer.salesforce.com/docs/atlas.en-us.pages.meta/pages/pages_compref_pageBlockButtons.htm