try to fix of pdf page layout

README.md

@@ -72,7 +72,7 @@ SOFTWARE.
 		* 2.2.4. [step4 network visualization](#step4networkvisualization)
 		* 2.2.5. [Export Network Data](#ExportNetworkData)
 		* 2.2.6. [Save Network Visual](#SaveNetworkVisual)
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 * 3. [Appendix](#Appendix)
 	* 3.1. [Switch Between Toolkit](#SwitchBetweenToolkit)
 	* 3.2. [Install Mzkit](#InstallMzkit)
@@ -234,8 +234,6 @@ Once the mzkit have been done of formula search, then all of the matched formula
 
 ![](docs/manual/de-novo-formulas.png)
 
-<div style="page-break-after:always;"></div>
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 You also can search of the formula by input any ``m/z`` value in the input box of the search result page. Click on the formula then you could submit the candidate formula into the biodeep database for search of the metabolite information.
 
 ![](docs/manual/export-formula-list.png)