How to modify interface tab Activity of Issue?

SungLB

I have source code jira 4.3.

Now, I want to modify interface tab Activity of issue.

You can guide to me or send to me some documents to guide to change interface tab activity of issue?

Thank you for help me !

grundic

<!-- Activity panel -->
    <web-panel key="activitymodule" location="atl.jira.view.issue.left.context" weight="900">
        <context-provider class="com.atlassian.jira.plugin.webfragment.contextproviders.MultiContextProvider">
            <param name="pluginKey">${project.groupId}.${project.artifactId}</param>
            <param name="ctxProvider-1">com.atlassian.jira.plugin.webfragment.contextproviders.I18nContextProvider</param>
            <param name="ctxProvider-2">com.atlassian.jira.plugin.webfragment.contextproviders.BaseUrlContextProvider</param>
            <param name="ctxProvider-3">com.atlassian.jira.plugin.viewissue.ActivityBlockViewIssueContextProvider</param>
        </context-provider>

        <resource name="view" type="velocity" location="viewissue/activityblock.vm"/>

        <label key="common.concepts.activity" />

    </web-panel>

jira-project/jira-components/jira-plugins/jira-view-issue-plugin/src/main/resources/atlassian-plugin.xml

Try to make changes in viewissue/activityblock.vm