Update README.md

Author: ZXW834

README.md

@@ -50,9 +50,9 @@ hyperparameter), the design is fixed and can be evaluated. If
 investigator wants to compare the design with different maximum sample
 size, just use the same cutoff (and hyperparameter) and only change the
 sample size parameter to create a new design for evaluation.
-<img src="https://github.com/ZXW834/BayesianPlatFormDesignTimeTrend/blob/main/man/figures/Asymmetric.png" width="70%" style="display: block; margin: auto;" />
-<img src="https://github.com/ZXW834/BayesianPlatFormDesignTimeTrend/blob/main/man/figures/Trippa.png" width="70%" style="display: block; margin: auto;" />
-<img src="https://github.com/ZXW834/BayesianPlatFormDesignTimeTrend/blob/main/man/figures/Designevaluation.png" width="70%" style="display: block; margin: auto;" />
+<img src="https://github.com/ZXW834/BayesianPlatFormDesignTimeTrend/blob/main/man/figures/Asymmetric.png" width="50%" style="display: block; margin: auto;" />
+<img src="https://github.com/ZXW834/BayesianPlatFormDesignTimeTrend/blob/main/man/figures/Trippa.png" width="50%" style="display: block; margin: auto;" />
+<img src="https://github.com/ZXW834/BayesianPlatFormDesignTimeTrend/blob/main/man/figures/Designevaluationwhiteback.png" width="70%" style="display: block; margin: auto;" />
 
 ## Demo